Lady Gaga and Beyonce's 'Telephone' Video Upsets Donny Osmond

49. Britney Spears: 'Womanizer' – Following her mental meltdown Britney's people knew the pop star would need to return to the fray with a bang and 'Womanizer' does just that in style. Directed by Joseph Kahn, in one scene we see a an oiled-up Britney writhing around completely naked in a sauna. Duly, it secured the singer endless column inches around the globe.

2 of 50