Diddy, Renee Zellweger, Bradley Cooper and Taylor Lautner.
As well as some entertaining dance moves, the 300 guests were treated to a late-night Indian takeaway as well as enjoying a cocktail created by Demi and Madonna especially for the party.
This single introduced Britney Spears to pop music fans around the world.
Written and co-produced by pop mastermind Max Martin, the song is full of hooks and a big mainstream pop sound.
So, if you’re keen to channel her classic Hollywood vibe for your next event, pick up a simple strapless dress for understated glamour.