Britney Spears oops she did it again! Spears tops Hollywood meltdowns of 2007 with incidents as emerging from a car without wearing any underwear; shaving her own head; a stint in rehab; a disastrous performance at the MTV Video Music Awards; a divorce from Kevin Federline and an ongoing custody battle over her two infant sons.

((Second-placed Owen Wilson attempted suicide in August, 07, while Paris Hilton came third following a tumultuous year which saw her jailed for violating her probation for drink-driving.