It took the one-two punch of Avril Lavigne and Slipknot to make Usher let go of the top slot on the Billboard album chart after spending eight weeks there. Lavigne's recent shopping-mall tour obviously paid off, as ''Under My Skin'' debuted at No. 1 and sold 381,000 discs, according to SoundScan. Masked metalmongers Slipknot were right behind, entering the chart at No. 2 and selling 243,000 copies of ''Vol. 3: The Subliminal Verses.'' Usher's ''Confessions'' had to settle for third place, shifting another 197,000 units. Gretchen Wilson's ''Here for the Party'' held at No. 4, with sales of 125,000. Method Man's ''Tical 0: The Prequel,'' dipped three places to No. 5 and sold 84,000 copies, about half as many as last week.
Prince's ''Musicology'' returned to the top 10, vaulting eight rungs to No. 8. Also entering the top 10 was the ''Shrek 2'' soundtrack, up three spots to No. 9. Hoobastank's ''The Reason'' (No. 6) and D12's ''D12 World'' (No. 7) switched places from last week. New Found Glory's ''Catalyst'' found glory fleeting and dropped seven spots to 10th place.