"I'm so excited. I'm snuggling with 48 bunnies, I think we have a world record here," Contactmusic quoted Diaz as telling Fallon.
During the odd segment of his show, Fallon also achieved the world record for drawing fake moustaches on strangers, by running around his show audience with a marker pen.
Meanwhile, Diaz, who starred along side Tom Cruise in Vanilla Sky, has said that she is 'really excited to work' with him once again in the new action film Wichita.
After reading the script, which Cruise had already accepted, she said: "Well, if I didn't like it, I wouldn't be doing it. I'm very, very excited about doing it. It's an action film, so I'm really excited to work with him."