WWE’s John Cena made an appearance on The Tonight Show Starring Jimmy Fallon to promote his new movie Sisters, starring Tina Fey and Amy Poehler, which hits theaters Dec. 18.

During his conversation with Fallon, Cena began reminiscing about a childhood girlfriend after Fallon declared his love for him.

“Love,” Cena began, “what’s love?”—which evolved into an improv ballad of Adele’s “Hello.”

But, in true Cena style, his flashback ended with giving his inner child a proper “attitude adjustment.”