Question: Inspired by "The Grey Album", which collaborative EP by Jay-Z and Linkin Park was released in 2004?
Context: LP Underground Tour was the second concert tour by American rock band Linkin Park.  It was launched in support of Linkin Park's official fan-club "Linkin Park Underground" and the released EPs by the club.  The tour started in February 2003, and ended in March 2003.  The duration of the tour was a month.  The last show played by the band was in support of their second album "Meteora". Minutes to Midnight World Tour was the fourth concert tour by American rock band Linkin Park.  It was launched in support of Linkin Park's third studio album, "Minutes to Midnight" (2007).  "Linkin Park Underground" the official fan club of the band released a live album as a part of their annual releases named as "LP Underground 7.0".  It consisted of the live performances of the shows across the 2007-Minutes to Midnight tour. The Living Things World Tour was the eighth concert tour by American alternative metal band Linkin Park.  It was launched in support of Linkin Park's fifth studio album "Living Things" (2012).  The tour was officially announced in April 2012 through a teaser released after the release of trailer of the 11th Annual Honda Civic Tour by Linkin Park and Incubus.  Later tour was officially announced during the Honda Civic Tour.  Its first leg under the name "Living Things South American Tour" began on October 5, 2012 in Buenos Aires and ended on October 12, 2012 in Porto Alegre.  Two shows during the whole tour were cancelled.  Both the shows were in Brazil.  The following statement was issued on the official site: "Due to logistical issues, some changes have been made to Linkin Park's upcoming Brazilian tour. "Numb/Encore" is a song by American rapper Jay-Z and rock band Linkin Park from their album "Collision Course" (2004).  It was released as a single on December 13, 2004, by Warner Bros., Machine Shop, Def Jam, and Roc-A-Fella Records.  The song is a mash-up combining lyrics from Linkin Park's 2003 single "Numb" and "Encore" by Jay Z. Linkin Park Live at Madison Square Garden, also styled as "Linkin Park Live at MSG", is a TV film which was broadcast by Fuse TV on February 18, 2011.  The concert was played at Madison Square Garden.  The concert was sponsored by Coca-Cola.  The concert was included in the band's tour "A Thousand Suns World Tour".  There were 15,170 tickets available for the concert and 15,170 tickets were sold.  Hence the profit from the concert was 100%.  The concert was heavily advertised because it was the third time that the band was performing a show in New York.  Before this he band had performed in the same venue with Jay-Z and alone in Webster Hall for the promotion of the band's third studio album Minutes to Midnight.  The whole tour of the band had Gross Revenue of $17,486,240.  This show made the tour a huge success. Hybrid Theory is the first EP by Hybrid Theory, a previous name of the band Linkin Park.  The album was recorded and self-released on May 1, 1999 (although the band has not confirmed or denied this, the date has stuck) through Mix Media.  Later that year, the band changed its name to Linkin Park and "Hybrid Theory" was re-mixed and remastered for another limited release in 2001 (with minor changes) in the credits and artwork for members of Linkin Park's fan club.  Only about 1,000 copies were pressed and released.  Original versions of the EP are hard to find. Collision Course is a collaborative EP from American rapper Jay-Z and nu metal band Linkin Park, released on November 30, 2004 by Roc-A-Fella, Machine Shop, Warner Bros. and Def Jam records.  Before the album, Jay-Z had released collaborations with The Roots and R. Kelly, and Linkin Park had collaborated with various artists on their remix album Reanimation.  The album was inspired by "The Grey Album" by Danger Mouse, which was a mash-up album between Jay-Z and The Beatles.  MTV had originally planned on mashing up only one or two songs, but the project was eventually expanded to a six-song EP.  The album was mostly produced by Mike Shinoda and Jay-Z, and was recorded between July 16 and July 19. The Grey Album is a mashup album by Danger Mouse, released in 2004.  It mixes an a cappella version of rapper Jay-Z's "The Black Album" with samples from The Beatles' LP "The Beatles", commonly known as "The White Album".  "The Grey Album" gained notoriety when EMI attempted to halt its distribution despite approval of the project from Jay-Z and the two surviving Beatles, Paul McCartney and Ringo Starr. The Hunting Party Tour was the eleventh concert tour by American alternative metal band Linkin Park.  It was launched in support of Linkin Park's sixth studio album, "The Hunting Party" (2014).  The tour was partially announced in May 2014 through a teaser released after the release of trailer of a co-headlined tour "Carnivores Tour" by Linkin Park and Thirty Seconds to Mars.  Later, the tour was officially announced on November 23 with a whole trailer in promotion.  Its first leg under the name "European Tour" began on May 30, 2014, in Lisboa, Portugal, and ended on June 14 in Castle Donington, England, where they played "Hybrid Theory" as a whole album.  The tour features special guests Of Mice & Men and Rise Against.  On January 15, 2015, the band begun the "world" tour for The Hunting Party with the first leg under "North American Tour".  During a show at Indianapolis, Chester Bennington injured his leg, which led to the cancellation of the tour "North American Tour".  The band continued the world tour on May 9, performing at the first edition of Rock In Rio in America.  It is the last full tour to feature Chester Bennington as vocalist before his death in 2017. In the Chamber with Linkin Park, also known as In the Chamber with Linkin Park: The String Quartet Tribute, is a tribute album to the American nu metal band Linkin Park.  Released on May 20, 2003 through Vitamin Records, it features cover versions of Linkin Park songs from "Hybrid Theory" and "Meteora", as they are all performed by the Vitamin String Quartet, except for the string quartet's original composing track, "Can't Stop What I'm Hearing Within".
Answer: Collision Course