Leighton Meester popped in to chat with Ellen, but what secret did she reveal about the Gossip Guys?

Leighton is on top of the world at the moment - not only does she play everyone's fave New York mean girl, but she has a blossoming modelling career and record deal. 

But it wasn't always so easy for her, as she opens up to Ellen about her difficult upbringing (her parents were both in jail and she was born in prison).

Leighton reveals just how vain those cheeky chaps on Gossip Girl really are, how much time they all spend together and she even donates her gorgeous Chloe dress (above) to Ellen's charity campaign for the Humane Society in America.

Check out what Leighton had to say...

Are you a Leighton lover, or is Blake your fave Gossip Girl?  Are you dying to hear Leighton's first single?