Somewhere between slugging back a shot of tequila and smearing cake icing on his nose, Bruce Springsteen shared a secret with his crowd Saturday ... an unbuttoned surprise set that hurtled deep ...

A surprise musical guest ... "I'm going to come and sing to the crowd tonight,"' he told the audience, adding, 'We have a special treat. Please welcome Jewel.' The singer was not previously ...

Jennifer Lopez proved she’s still the queen of the dance floor during a surprise performance ... star had the crowd "buzzing" as she effortlessly commanded the stage. The singer's performance ...

On Monday, Jan. 13, the rapper and singer, 30 ... The cheers and applause from the crowd then grew louder as people expressed their surprise. “This is Bad Bunny, he’s got a new record out ...