On November 25, 2003, Jay-Z held a concert—billed as a "retirement party" at Madison Square Garden in New York City, which would later be the focus of his film "Fade to Black". All proceeds went to charity. Other performers included collaborators like the Roots (in the form of his backing band), Missy Elliott, Memphis Bleek, Beanie Siegel, Freeway, Mary J. Blige, Beyoncé, Twista, Ghostface Killah, Foxy Brown, Pharrell Williams and R. Kelly with special appearances by Voletta Wallace and Afeni Shakur, the mothers of The Notorious B.I.G. and Tupac Shakur respectively. While Jay-Z had attested to a retirement from making new studio albums, various side projects and appearances soon followed. Included in these were a greatest hits record, as well as the release and tour of "Unfinished Business", the second collaborative album between Jay-Z and R. Kelly. In 2004, Jay-Z collaborated with rock group Linkin Park, in which they released their collaborative remix EP "Collision Course", which featured mashups of both artists' songs, as well as a concert DVD. The album's only single, "Numb/Encore", went on to win a Grammy for Best Rap/Sung Collaboration, and was performed with Linkin Park live at the Grammys, with a special appearance by Paul McCartney, who added verses from the song "Yesterday". The EP sold over 1 million copies in the US. Jay-Z was the executive producer of "The Rising Tied", the debut album of Fort Minor, the hip hop side project of Linkin Park rapper Mike Shinoda. Jay-Z also planned to retire in 2004. Later in 2004, Jay-Z was named president of Def Jam Records, which led to Jay-Z, Dash and Biggs selling their remaining interests in Roc-A-Fella Records and Jay-Z taking control of both of the companies. Reportedly this major industry move was prompted by disagreements between Jay-Z and Dash as to what direction Roc-A-Fella could undertake. The publicized split between Jay-Z, Dash, and Biggs led to the former partners sending jabs at each other in interviews. On October 27, 2005, Jay-Z headlined New York's Power 105.1 annual concert, Powerhouse. The concert was entitled the "I Declare War" concert leading to intense speculation in the weeks preceding the event on whom exactly Jay-Z would declare war.