LAS VEGAS -- Bradley Cooper made a surprise appearance during "A Star is Born" co-star Lady Gaga's show Saturday night for a surprise performance of "Shallow," the film's chart-topping single.

Can’t read her poker face. Lady Gaga suffered a nasty fall while performing in Las Vegas over the weekend — but recovered like a pro, as seen in a viral fan video. The Grammy winner’s ...

Tickets for Lady Gaga's "The Mayhem Ball" in Las Vegas are officially available on StubHub. The first show at T-Mobile Arena, set for July 16, has ticket prices starting at $346 and reaching $2,719.

Lady Gaga’s next album, “Harlequin,” is due out Friday. The release is a companion to the upcoming film “Joker: Folie à Deux” and encompasses a lucky 13 tracks.

Lady Gaga took a nasty tumble during her Las Vegas show over the weekend. Kevin Mazur/Getty Images for Live Nation The Grammy winner was singing “Vanish Into You” when she slipped Saturday.