Leona Lewis has admitted that she often mistakes famous people for friends.

The X-Factor winner, who is currently battling it out for the No.1 spot with her third album, 'Glassheart,' told New magazine that she has a habit of getting herself in embarrassing situations with various celebrities:

"It's really weird. Usually when I see someone famous, for some reason, I think I know them.

"I've approached people so many times just because they are a familiar face. I smile at them and go to talk to them and clearly they don't know me!”

The 27-year-old, who this week claims that she recorded Rihanna’s ‘We Found Love’ first, then revealed which stars she’s approached without really knowing them:

"I've done it to Taylor Lautner from Twilight and a few of the EastEnders actors too. It's really embarrassing, but I do it all the time!"