Britney Spears and fiancé Sam Asghari continue her 40th birthday celebration on the beach

Britney Spears' fiance Sam Asghari jokingly stuffs shorts to look like he has a bigger rear

Paris Hilton Celebrates 15th Anniversary Of That Iconic Car Photo With Britney Spears & Lindsay Lohan!

Kate & Oliver Hudson Belt Out ‘Happy Birthday’ For Britney Spears’ Milestone 40th – Watch