1. Circus - Britney Spears With a “Toxic” sequel video, her biggest single since “..Baby One More Time”, and a #1 album with productions by early hitmakers Max Martin and Guy Sigsworth, it’s almost as if Britney world was never disrupted. With varied pop beats and nary a mention of her recent troubles, “Circus” picks up right where “In The Zone” left off.

Source: AHN.com