Question: The rock band joined by Tru Collins in 2010 has sold approx. how many concert tickets?
Context: Sylvain Cossette (born May 8, 1963) is a French-Canadian singer-songwriter from Grand-Mère, Quebec (located in the Mauricie region).  Sylvain was a founding member of the Quebec-based English language band Paradox in 1984, before becoming a French language solo artist by 1994.  During his career he has sold over one million albums (12 Gold and Platinum), recorded thirty-two #1 hit songs and eight Number 1 albums, earned six Silver, Gold and Platinum Tickets, won 10 Quebec Felix Music Awards, six Socan awards and four Juno nominations, and performed in Canada and Europe in the hit stage musicals "Notre Dame De Paris" and "Dracula".  Cossette's 2001 album "Rendez-vous" was certified Platinum by the CRIA in November 2002.  His 2007 album "70s" (#1 Quebec, #2 Canada) is his first all English release and produced four Number 1 hit singles and two Number 1 hit videos.  The album went Gold (50,000 CDs sold) in 27 days and Platinum (100,000 CDs sold) in 15 weeks.  The 70s concert tour went Silver Ticket (25,000 tickets sold) in three months and Gold Ticket (50,000 tickets sold) within a year.  On October 21, 2008, he released the album "70s Volume 2" and produced three Number 1 hit singles and one Number 1 hit video.  The album went Gold (50,000 CDs sold) in 19 days and Platinum (100,000 CDs sold) in 11 weeks.  On October 25, 2010, the album 70s Volume 3 was released and quickly went Gold.  The 70s project has so far sold almost 400,000 albums, 150,000 concert tickets and been seen by over a 650,000 people at outdoor festivals.  In September 2011 he launched his new one-year tour «The Best of the 70s».  In October 2011, two compilation albums were released of his greatest French language hits.  On October 1, 2012, he release his first original French language album in 12 years called "Le jour d'après" (4 number one hit songs) which he wrote, co-arranged and co-produced.  His next album RETROSPECTIVE spawned a tour throughout French Canada in 2013-2014.  In April 2014 he released an album "Les numérous 1" of his career #1 hit songs that he composed.  A new trilogy project (album/photobiography book/tour) called ACCORDS was released in October 2014 and spawned three Number 1 hit singles followed by a tour throughout French Canada in 2015.  In 2014-16 he was the creative force behind two children projects (albums and live shows): Lily et le Lutin & Pyjama Party.  In 2017 he released his first instrumental album Café et Guitares in over 200 countries. "No Sleeep" is a song recorded by American singer Janet Jackson for her eleventh studio album "Unbreakable" (2015).  Co-written and produced by Jackson and her long-time collaborators Jimmy Jam and Terry Lewis, it is the first record to be released under Jackson's independent label Rhythm Nation Records, distributed by BMG Rights Management.  It was made available as the lead single from the album digitally on June 22, 2015, in addition to vinyl copies being sold on Jackson's official website in conjunction with pre-sale orders for the studio album and Unbreakable World Tour concert tickets.  Lyrically, the song depicts Jackson longing to reunite with her lover, anticipating that when she does, the couple will get "no sleep".  Due to its slow tempo and sentimentality, it has been described as embodying traits of quiet storm. Trans-Siberian Orchestra (TSO) is an American progressive rock band founded around 1993 by producer, composer, and lyricist Paul O'Neill, who brought together Jon Oliva and Al Pitrelli (both members of Savatage) and keyboardist and co-producer Robert Kinkel to form the core of the creative team.  The band gained in popularity when they began touring in 1999 after completing their second album, "The Christmas Attic" the year previous.  In 2007, the "Washington Post" referred to them as "an arena-rock juggernaut" and described their music as "Pink Floyd meets Yes and The Who at Radio City Music Hall."  TSO has sold more than 10 million concert tickets and over 10 million albums.  The band has released a series of rock operas: "Christmas Eve and Other Stories", "The Christmas Attic", "Beethoven's Last Night", "The Lost Christmas Eve", their two-disc "Night Castle" and "Letters From the Labyrinth".  Trans-Siberian Orchestra is also known for their extensive charity work and elaborate concerts, which include a string section, a light show, lasers, "enough pyro to be seen from the International Space Station", moving trusses, video screens, and effects synchronized to music. Tru Collins is an American actress and indie-pop singer.  She is known for her role of Julie on MTV's original high school comedy, Awkward.  Tru was born in Richmond, Virginia to five-time Emmy Award winning television journalist Reid Collins and choreographer Lindy Fisher.  She attended Manhattan's Professional Performing Arts School at 15 while studying classical piano and training with Elaine Kudo of American Ballet Theatre.  Collins began college with a songwriting scholarship from Universal and studied at New York University and The New School in New York City.  In 2014, she guest starred on Showtime's period drama Masters of Sex opposite Michael Sheen and had a supporting role in Spring Awakening, an indie film set in the late 1800s.  Tru has recurred as mean girl Julie on MTV's Awkward seasons 2 - 5.  As a singer, she performed with Grammy-winning soul singer Latrice Varrett, opening for Aretha Franklin at the Nokia Theatre Times Square in 2009.  In 2010, she joined Atlantic Records' multi-platinum progressive rock band Trans-Siberian Orchestra as a vocalist, touring arenas across North America and promoting the band performing acoustic guitar/vocal solos live on numerous rock radio stations.  That year, TSO reached #12 on the Billboard charts for American Arena Tours, beating Taylor Swift and Justin Bieber.  The tour grossed $47,395,108 and sold out 51 arenas.  She has co-written songs with Rostrum Records artist Vali and Three 6 Mafia's Juicy J, and her work has been featured on various recordings and television soundtracks.  In 2012, Collins performed with DJ Ravi Drums, Kitara player Craig Dobbin, and rapper Wes Period at the Air Canada Centre Arena in Toronto.  In 2015, Tru joined Steven Seagal's blues band Thunderbox for a European tour and performed with ten-time Grammy Award winner George Benson at the Cognac Blues Passion Festival in Cognac, France.  Her debut solo EP, "Story of A Gypsy Child", from producer Jonny on the Rocks of Brooklyn bands Shinobi Ninja and Rocky Business, is set for 2015 release.  Her music video for the first single, "Party Dress", was released via YouTube in February 2015. Natalia Druyts (born 3 December 1980), best known mononymously as Natalia, is a Flemish recording artist and performer.  She has sold over 500,000 albums, and over 1 million concert tickets between 2003 and 2015 in Flanders. American singer Usher has embarked on five concert tours, four of which have been worldwide.  He first served as an opening act for Mary J. Blige, Janet Jackson, and Puff Daddy from 1997–1999.  His solo tour debut, 8701 Evolution Tour began in North America then expanded to Europe and visiting Africa, supporting his third studio album, "8701" (2001).  Following the release of his fourth studio album, "Confessions", Usher embarked on his next world concert venture The Truth Tour.  For this tour Usher collaborated with MasterCard, the company gave him his own prepaid debit card with his picture on it that was sold at his concert.  The card gave his fans access to his website where you get discounts on concert tickets and Usher merchandise, T-shirts and key chains.  In 2008, to promote his fifth studio album, "Here I Stand", he began his 14 date at intimate clubs and theaters venues in the United States. The Last Waltz was a concert by the Canadian-American rock group The Band, held on American Thanksgiving Day, November 25, 1976, at Winterland Ballroom in San Francisco.  "The Last Waltz" was advertised as The Band's "farewell concert appearance", and the concert saw The Band joined by more than a dozen special guests, including Eric Clapton, Ringo Starr, Bob Dylan, Ronnie Wood, Muddy Waters, Neil Young, Neil Diamond, Van Morrison, Bobby Charles, Dr. John, Paul Butterfield, Emmylou Harris, A concert hall is a cultural building with a stage which serves as a performance venue and an auditorium filled with seats.  While early halls built in the 18th and 19th century were designed for classical orchestra, concerto and opera concerts and ballet performances, halls built in the 20th and 21st century were often built to accommodate a wider range of performance types, including musicals.  In the 2010s, popular music such as rock music and traditional music such as folk music are also performed in these venues.  Many concert halls exist as one of several halls or performance spaces within a larger performing arts center.  In many towns, the concert hall is combined with a convention center.  Concert halls typically also contain orchestral rehearsal rooms.  Many larger cities have both public and private concert halls.  Particularly in smaller cities with fewer alternative venues, concert halls may also be used to accommodate other activities, from theatrical performances to academic presentations and university graduation ceremonies. KSYR is a contemporary Latino music radio station in Benton, Louisiana.  The station was formally known as "The Buzz", created as an alternative rock addition to Shreveport, and competed mainly with local hard rock station, 99x.  The Buzz brought a refreshing new style of music to the area, featuring many bands that were not played on 99x or any other station.  On Saturday nights, The Buzz was transformed into "Club Buzz," where all the songs played were techno-influenced remixes of the normal alternative songs that it played.  The Buzz also featured a variety of interaction with listeners as well as original contests.  Weekly contests featured were "The Free Buzz at 4:20", "Thumbs Up or the Finger", "The Buzz Rewind", and the short lived "Buzz Bits", where listeners could call in and say whatever they wanted, within reason.  Its "Too Cool for Tool" contest was also original, with each contestant sitting on a large tub of ice, and whoever lasting the longest receiving a pair of Tool concert tickets, along with a "Tool"-box full of Tool SWAG.  The Buzz came to an abrupt end in 2004, in circumstances where it was literally there one minute and gone the next.  No reason was ever stated for the cancellation of the station, and the format was quickly switched to Christmas music until the start of the new year.  Since The Buzz, the station has been a light rock station and its current format is Spanish radio. The Warp Riders Tour is a 2010–2011 worldwide concert tour by American heavy metal band The Sword.  Beginning on October 1, 2010 in the United States, the tour is in promotion of the band's upcoming 2010 third album "Warp Riders", released on August 24, 2010.  Following the United States leg of the tour, the band joined Soundwave, a travelling music festival, in Australia in 2011.  They will then perform an additional 12 shows in Europe.  Prior to the tour, the band supported Metallica on their continuing World Magnetic Tour in September, and during the tour they also performed at the Austin City Limits Festival, between October 8 and October 10.
Answer: 10 million