What did American Idol Carrie Underwood ever do to on again off again Jessica Simpson sweetie John Mayer? Mayer, a guitar whiz kid may not want to quit his day job. The soulful singer broke into some kind of sappy sounding whining stand up routine where he rips on idol winner Carrie. During the performance, at New York City's Comedy Cellar, he pokes fun at single life, his own music – and sings a raunchy ballad as part of a joke about Carrie Underwood's hit "Before He Cheats."

Jessica Simpson Sweetie John Mayer Rips American Idol Carrie Underwood

Of Underwood's song, he says: "It's basically a woman, for 4½ minutes, just abusing the s--- out of a guy." In a falsetto, he sings the lyrics about a woman keying her boyfriend's car with the chorus, "Maybe next time, he'll think before he cheats." Jokes Mayer: "Maybe he's not cheating. Maybe he kind of broke up with you and you're not hearing it."

***

Maybe the same could be said about Jessica. Mayer is constantly referred to as deep but comes across as shallow here in a sophomoric attempt at humor. Mayer also laments that as a male songwriter he can't get as aggressive in songs as female singers can – then makes up a raunchy ditty about sex and how the girl after the physical abuse 'will think next time before she speaks.

Drop the comedy mic and pick up a guitar man.