John Cena Sings "Hello," Talks Time Off From WWE, Bodybuilding Past And More On "The Tonight Show"

John Cena appeared on "The Tonight Show with Jimmy Fallon" last night to promote the new "Sisters" movie with Amy Poehler and Tina Fey, as seen in the videos above and below.

In the video above, Cena talked about his fight scene with SNL's Bobby Moynihan in the movie, and talked about Moynihan being a big WWE fan.

Regarding wrestling, Fallon asked Cena if he was relaxing while taking time away from WWE and Cena talked about filming FOX's American Grit, saying he never takes time off to relax.

In the clip below, Cena talked about his bodybuilding past. Cena joked that he "made the stupid mistake" to go on stage and oil himself up with a bunch of other guys, but he's over it because now he goes on stage with other dudes and...

Cena also did some comedy on the show, singing his own version of Adele's "Hello" single and then reuniting with his "inner child" before hitting him with an Attitude Adjustment: