Boomer Esiason has taken the Seinfeld bellybutton 'Helloooo! La, la, la!' to the next level

Boomer and Carton have for years plagiarized the Seinfeld 'Helloooo! La, la, la!' sound he imagined from Claire's belly button in The Voice as a cute greeting from callers.

So much so that they had callers prank Mike Francesa with it.

Now? Esiason's trained his belly button to sing.


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