"Extra's" Mario Lopez caught up with Ashton Kutcher, who stars in the new romantic comedy "No Strings Attached," alongside Golden Globe nominee Natalie Portman -- and he told Mario how he prepared for his nude scene.

"It's funny, for this movie, I intentionally didn't work out," Kutcher said. "So stuff where I had my shirt off, I wasn't really comfortable with myself." Watch Ashton's interview.