Bono sang spontaneously for diners at Nobu in LA on Tuesday night with George Clooney, Cindy Crawford and Rande Gerber.

Spies said the U2 rocker — in town to perform his band’s “Ordinary Love” at the Oscars — was with Clooney and company “late into the night,” and they started “singing oldies by the Eagles and Neil Diamond.

They seemed oblivious to the crowd watching them.”

Perhaps boosting their courage were orders of sake and Clooney’s Casamigos tequila.