The 25-year-old actress was terrified about shooting the raunchy sequence
with co-star Jim Sturgess and drank alcohol beforehand to calm herself down.

She said: "I don't remember filming that scene. We were both so drunk! Jim
and I became such good friends, we decided to have a couple of drinks,
loosen up and go for it."
British actor Jim - who plays the lead role in '21', - said they soon realized drinking before the scene
wasn't a good idea.
He told People magazine: "We were drinking Grey Goose vodka, I think. It was
brilliant for about half an hour. But as we continued to drink it just
became sloppy and messy. I couldn't even stand up at one point!"