We bet you didn’t know these celebrities once dated!

Some of them may seem as different as chalk and cheese, and others dated for barely a few days – so it is rather difficult, if not altogether impossible, to imagine them together! But the fact remains that these celebrities were a couple once.. years ago, in what feels like another universe now! We bet you had no idea!

Justin Timberlake and Jenna Dewan

That’s right! The now Mr Jessica Biel and Mrs Channing Tatum were once “more than just friends”. Jenna, in fact, recently even opened up about it on a TV talk show. The two had dated wayyy back, when the actress used work for Justin as a back-up dancer. It was after his much-talked about break up from Britney Spears, and was very short-lived. Jenna said they continue to be good friends now.

Sandra Bullock and Ryan Gosling

Image courtesy: nydailynews.com

Ryan may have kids with Eva Mendes now, but before that (and his several link-ups that preceded it), he was with Sandra Bullock. She was 16 years older, but Ryan had reportedly even confessed once in an interview that she was one of his greatest girlfriends of all time. The duo were together for a while before splitting in 2002.

Madonna and Michael Jackson

Image courtesy: usmagazine.com

WHAT!!! This one takes the cake! The two were the biggest pop stars of the time and their link-up was what music lovers’ dreams are made of. This was in 1991 – they made a debut of sorts as a couple when Madonna brought him along as her date for the Academy Awards. Sources say the two were together for only a week, though. In one of the episodes of Carpool Karaoke with James Corden, she even talked about how they would make out, and that it was she who made the first move because he was shy.

Robbie Williams and Cameron Diaz

The two had apparently hooked up in the summer of 2003! The affair was over before people could even take notice properly, but the two continued to be good friends. In fact, Diaz even intervened and helped Robbie get back with actress Ayda Field, who he later married. Diaz is now married to Benji Madden.

Renee Zellweger and Bradley Cooper

He is now seen carrying his adorable daughter around, with lover Irina Shayk in tow, but Bradley had dated Renee for almost two years before they called it quits in 2011! TWO years! For the actor, apparently work came first – he chose that over her and parted ways.

Bradley Cooper Cameron Diaz Celebrity Hollywood Jenna Dewan Justin Timberlake Madonna Michael Jackson Renee Zellweger Robbie Williams Ryan Gosling Sandra Bullock