Justin Bieber's "My World 2.0" album is back at No. 1 on the Billboard 200, but with a rather dreary sales figure . . . It's the Bieb's fourth nonconsecutive week at the top of the chart . . . the National, the Dead Weather, Charice and As I Lay Dying also see their latest efforts bow in the top 10 . . . Katy Perry's "California Gurls" heats up the Digital Songs chart as it enters at No. 1 with an eye-popping bow of 294,000 downloads sold, according to Nielsen SoundScan.
