Dr Dre recently was asked about the multiple "Detox" tracks that have leaked to which the producer said the songs will not be included on the album.
"It's no leaks that came out that are going on the record," Dre promised in an interview last week. "I got hard new sh*t. I had a little bit of a leak in my security and what have you but I got new sh*t coming and trust me, it will not be anticippointment, you know what I mean? Y'all n*ggas gonna love this sh*t. Yeah!"
Source - http://www.rapbasement.com/dr-dre/092410-hit-producer-dr-dre-says-recently-leaked-songs-wont-be-on-his-detox-album.html