We're singing Happy Birthday here at Sugar UK HQ, as Kristen Stewart turns 20 today! The Twilight saga actress has had another big year, and we're celebrating the end of her teenage years with a celebrity birthday quiz. Check out FabUK's quiz plus PopUS's slideshow and then answer these questions to find out how well you know the birthday girl. Good luck!
How Well Do You Know Birthday Girl Kristen Stewart?
Where was Kristen born?