Question: What singer has sold over 3 million albums and 5 million singles worldwide released his second studio album on May 15, 2012?
Context: American singer Christina Aguilera has released seven studio albums, one extended play (EP), six compilation albums, one soundtrack album, forty-two singles (including eight as featured artist), and ten promotional singles. To date, Aguilera has sold over 50 million albums.  In the United States alone, she has sold 17.9 million albums as of 2014, with 14.5 million units certified in the country.  With such achievements, "Billboard" recognized Aguilera as the 20th best-selling artist of the 2000s.  In the United Kingdom, Aguilera has sold over 3.3 million albums and 6.1 million singles. Trespassing is the second studio album by American singer Adam Lambert, released on May 15, 2012 by RCA Records Originally scheduled for March 20, 2012, the album was pushed back for two months in order to add more songs and collaborations.  In late March, alongside the reveal of snippets of four album tracks, Lambert announced on Twitter that the album would be released on May 15, 2012.  Lambert is the executive producer on "Trespassing", as well as a principal writer. English singer and songwriter Amy Winehouse released two studio albums, one live album, three compilation albums, four extended plays, 14 singles (including three as a featured artist), three video albums and 14 music videos.  At the time of her death on 23 July 2011, Winehouse had sold over 1.75 million singles and over 3.98 million albums in the United Kingdom.  Meanwhile, she had sold about 3.4 million tracks and 2.7 million albums in the United States as of the same date. Adam Mitchel Lambert (born January 29, 1982) is an American singer, songwriter and stage actor.  Since 2009, he has sold over 3 million albums and 5 million singles worldwide. Avril Ramona Lavigne ( ; ] ; born 27 September 1984) is a Canadian singer-songwriter and actress.  By the age of 15, she had appeared on stage with Shania Twain; by 16, she had signed a two-album recording contract with Arista Records worth more than $2 million.  In 2002 she released her debut album, "Let Go", emphasising a skate punk persona in which she has been often referred by critics and music publications as The "Pop Punk Queen" due to her achievement and impact in the industry.  Lavigne is considered a key musician in the development of pop punk music since she paved the way for female-driven, punk-influenced pop music.  Since her professional debut, Lavigne has sold more than 40 million albums and over 50 million singles worldwide, making her the 2nd-best-selling Canadian female artist of all time, behind Celine Dion. American singer and songwriter Mary J. Blige began her career as a backing vocalist for Father MC in the early 1990s.  Her discography as a solo artist began in 1992 and consists of thirteen studio albums, two live albums, two remix albums and over eighty singles—including more than 20 as a featured artist.  Blige has sold over 50 million albums and 15 million singles worldwide.  In 2009, "Billboard" magazine ranked Blige as the most successful female R&B artist of the past 25 years, while listing her 2006 song "Be Without You" as the top R&B song of the 2000s, as it spent an unparalleled 75 weeks on the Hot R&B/Hip-Hop Songs chart, 15 of them at number one.  In 2011, VH1 ranked Blige as the 80th greatest artist of all time.  Moreover, she was ranked 100th on the list of "100 Greatest Singers of All Time" by "Rolling Stone" magazine.  In 2012, VH1 ranked Blige ninth among "The 100 Greatest Woman in Music" listing. The discography of American girl group The Pussycat Dolls consists of two studio albums, one extended play, two live albums, 14 singles, two promotional singles and 13 music videos. To date, the group has sold 15 million albums and 40 million singles worldwide. The discography of American singer and songwriter Adam Lambert consists of three studio albums, one live album, four compilation albums, three extended plays, ten singles, and six music videos.  As of January 2011, he had sold 1.2 million albums and 4.2 million singles worldwide. The discography of Colbie Caillat, an American musician and singer-songwriter, contains six studio albums, seven extended plays, one compilation album, twenty-two singles (including six as a featured artist), twenty-two music videos and other album appearances and songwriting credits.  Caillat rose to fame through social networking website Myspace.  At that time, she was the number-one unsigned artist of her genre.  After signing with Universal Republic, she released debut album in July 2007, "Coco" has sold 2,060,000 copies in the United States and is certified 2× Platinum.  In August 2009, she released "Breakthrough", her second album which became her first album to debut at number one on "Billboard" 200.  It has been certified Gold by RIAA.  In July 2011, she released her third studio album, "All of You".  In October 2012 she released her first Christmas album, "Christmas in the Sand".  Caillat sold 6 million albums and 10 million singles worldwide. English singer and songwriter Ellie Goulding has released three studio albums, one remix album, seven extended plays, 24 singles (including six as a featured artist), five promotional singles and 32 music videos.  As of June 2013, Goulding had sold three million albums and 10 million singles worldwide.  Additionally, she had sold over 1.5 million albums and over 4.3 million singles (including collaborations) in the United Kingdom alone as of February 2014.
Answer: Adam Mitchel Lambert