Britney Spears dances to ex's song in sultry Instagram vid

Britney Spears shows off her raunchy moves in a sheer sequin dress as she dances to ex Justin Timberlake's song and dubs it the 'nasty version'

Britney Spears posted one of her famed dancing videos to Instagram in which she danced to a remake of her ex-boyfriend Justin Timberlake's song, dubbing it the 'nasty' version.