The top-of-the-world moment for D12's ''D12 World'' was short-lived. After one week atop the Billboard album chart, Eminem's rap posse saw its sales plummet 63 percent, as Usher retook the throne that's been his for six of the last seven weeks. Usher's ''Confessions'' sold another 267,000 discs, according to SoundScan (that's 5,000 more than last week), while ''D12 World'' settled for a second-week finish in second place with sales of 196,000. Prince, whose concert ticketbuyers each get a ''Musicology'' CD as part of the ticket price, moved another 150,000 units this week and held on to third place. Debuting at No. 4 was Petey Pablo, whose ''Still Writing in My Diary: 2nd Entry'' (the follow-up to the rapper's 2001 debut, ''Diary of a Sinner: 1st Entry'') sold 117,000 copies. That pushed jazz chanteuse Diana Krall's ''The Girl in the Other Room'' down one notch to No. 5, selling 97,000 copies in its second week of release.
Mother's Day giftbuyers apparently were behind the return to the top 10 of Norah Jones' ''Feels Like Home'' (up three spots to No. 8) and Josh Groban's ''Closer'' (up nine to No. 9). Also in the top 10 were Hoobastank's ''The Reason'' (up one to No. 6), Mario Winans' ''Hurt No More'' (sliding two slots to No. 7), and ''NOW That's What I Call Music! Vol. 15,'' dropping four rungs to 10th place.