Last week Usher bumped his young protégé Justin Bieber from the top spot on the Billboard album chart, and this week Mr. Bieber returns the favor. “My World 2.0” (Island) by the 16-year-old Mr. Bieber — seen on “Saturday Night Live” with Tina Fey as host last week — returned to No. 1 with 102,000 sales, according to Nielsen SoundScan, and Usher’s “Raymond v Raymond” (Jive) fell one spot to No. 2, with 92,000. Slash, the guitarist once of Guns N’ Roses, is at No. 3 with his new, self-titled album, released by EMI, which sold just more than 60,000 copies in its first week out. The country band Lady Antebellum rose one spot to No. 4 with its album “Need You Now” (Capitol Nashville), which sold just fewer than 60,000 copies.

Down the chart, Madonna opened at No. 10 with her live album “Sticky & Sweet Tour” (Warner Brothers), which sold 28,000; it is her 19th album to reach the Top 10. Sharon Jones and the Dap-Kings have officially become Brooklyn’s biggest retro-soul band: their latest, “I Learned the Hard Way” , sold 23,000 copies in its first week out to land at No. 15, right between releases by Alan Jackson and Kesha.