John Stamos Shows Off His Singing Chops With Unhinged Rendition of 'Y.M.C.A.'

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What ever happened to predictability? 'That's My Jam,' that's what.

John Stamos has blessed us with a rare musical performance of his own!

The fictional Jesse and the Rippers frontman—who delighted Full House fans whenever his character would whip out "Forever"—and occasional guest member of The Beach Boys took the stage once again with a cover of famous-middle-school-dance-song: "Y.M.C.A" by the Village People.

However, he has put one hell of a twist on it.

In a preview of the March 28 episode of That's My Jam, which airs Tuesdays on NBC at 10 p.m., Stamos takes part in a segment Jimmy Fallon calls "Nonsense Karaoke," where "the lyrics have been replaced with total nonsense."

When it lands on the Village People's classic track, Fallon turns to Stamos and says, "Yeah, everyone knows that, right?"

"I think so, but it's not going to be that," he points out.

Fallon agrees, "No, it's going to be embarrassing," before leading the TV star to the mic.

As the music kicks in, Stamos starts bopping to the groove, whipping his jacket off, which leads to fellow competitor Taraji P. Henson to start cheering before he even opens his mouth.

As promised, what comes out of it is nothing short of unhinged, but he's nothing if not professional, belting out the lyrics as though he knows them by heart.

Related: John Stamos' Reaction to Josh Peck Singing the 'Full House' Theme While in San Francisco Is Priceless

"Spray tan, now I look like a clown/Lego Batman, is my iPhone background," the first line goes, and it only gets worse from there.

"Get the trashcan, this guacamole is brown/and it came, from, Cin-cinn-ati. Plump hands, can't wear gloves when it snows/I watch C-SPAN, with a grape up my nose. My ex-girlfriend, looks like Optimus Prime/hold on Craig, wants, me, to FaceTime," he continues, leading another competitor, Craig Robinson, to whip out his phone.

The chorus keeps the chaos going as he croons, "I split an Uber with Tim Chalamet," leading him to break in laughter before adding, "Not the actor, just some guy from LA."

Eventually, Fallon jumps in to share the mic and they duet, "We ate buffalo wings, they were spicy, oh boy/Pamplemousse is the best LaCroix. I split an Uber with Tim Chalame/Not the actor just some guy from LA. He played 'Come On Eileen,' on a new glockenspiel/then he borrowed my snowmobile."

We're not sure how any of the other competitors will top this particular performance, but we'll be tuning in with bated breath to find out!

Related: Watch Sarah Hyland Channel Her Inner Avril Lavigne on 'That's My Jam' (Exclusive)