"they just announced it on TRL that he'll do a song for their new album (first single). they're also opening for the stripped/justified tour.
edit:
http://www.mtv.com/news/articles/147...headlines=true
Things could be a lot worse for the Black Eyed Peas these days. With a new album on the way, the rappers are making the most of their new friendship with Justin Timberlake.
The 'NSYNCer-gone-solo provides vocals on "Where's the Love," the first single from the group's upcoming Elephunk. The group's long-awaited follow-up to 2000's Bridging the Gap will also feature help from Macy Gray, Wyclef Jean, Mos Def, De La Soul and others (see "Black Eyed Peas Exhibit New Breed Of Elephunk On Upcoming LP").
Timberlake has also tapped Black Eyed Peas for an opening slot on his upcoming tour with Christina Aguilera (see "Justin Timberlake/ Christina Aguilera Tour Dates Announced"). The trek will give the group a prime opportunity to promote Elephunk, which was originally slated for release last October.
—MTV News staff report"