Actress Emma Stone made an appearance on "Late Night With Jimmy Fallon" Wednesday to promote her new teen comedy, "Easy A." But Fallon had a surprise for the cute redhead; he challenged her to use the hilarious workout device the Shake Weight for 15 seconds, even after she proclaimed that "it's practically pornographic." Watch the shenanigans!
Stone also confirmed she'll be hosting "Saturday Night Live" Oct. 23. "Easy A" opens in theaters Friday, Sept. 17.