In 1985, 'We Are the World' sold 4 million singles and 3 million albums with an inclusiveness that allowed Michael Jackson, Bob Dylan, Kenny Rogers, and Cyndi Lauper to share space on the same charity anthem. Another African crisis 16 years later--the spread of AIDS across the continent--and the aftermath of the September 11, 2001, attacks prompt this well-meaning remake of Marvin Gaye's 1971 Vietnam-era protest. Rather than the pop unity of the earlier record, however, this 48-minute EP breaks down into nine separate mixes and mix-and-match rosters aimed at different radio and club formats. After all, global village or not, Bono, Nelly, Jennifer Lopez, Scott Weiland, and Moby couldn't possibly coexist for four minutes, right? (Hearing Michael Stipe ride Jermaine Dupri's pop/hip-hop track for even a line raises intriguing possibilities for the R.E.M. singer.) The record's handful of lyric substitutions are clumsy, with 'Picket lines won't bloc...