Britney Spears wore a patchwork denim gown and Justin ... while Riff Raff captured Timberlake's essence with his goofy sunglasses and generally delighted demeanor. Seemingly flattered, Spears ...

Britney Spears turned 40 on Thursday and celebrated ... who was clad in a plaid shirt and sunglasses. The video then featured Spears enjoying the music of a mariachi band as someone handed her ...