In 2010, Dr. Dre said that an album of just music called The Planets is in its first stages of production; each song being named after a planet. Later that year, Dr. Dre showed support to long time friend Eminem, and appeared at his and Jay-Z's Tour, performing songs "Still D.R.E.," "Nuthin' but a 'G' Thang," and "Crack a Bottle," with Eminem & 50 Cent. Wearing an "R.I.P. Proof" shirt (proof was a rapper who died, he was also a friend of Dre, Eminem & 50 Cent). The crowd the chanted "DEEE-TOX," to which he replied, "I'm coming!" As if to say the album's release is not that long away. Dr. Dre was featured on the cover of a magazine in a 2011 issue. After Detox he will be one of the producers of Tionne "T-Boz" Watkins' album Still Cool. In 2012 Dre was announced to headline at a music festival called the Coachella Valley Music and Arts Festival taking place the weekends of April 13–15 and April 20–22 which featured a holographic 2Pac.