If rumours are to be believed, then Hollywood actress Angelina Jolie had an affair with singer Lady Gaga.

According to Ian Halperin, author of the recent bestseller Brangelina: The Untold Story of Brad Pitt and Angelina Jolie, the ‘Tomb Raider’ star might have cheated on partner Brad Pitt with GaGa.

Jolie — who is openly bisexual — and GaGa — a rumoured hermaphrodite — had a secret rendezvous at the Beverly Wilshire Hotel that lasted all night, Halperin alleges.

Jolie is reportedly ‘obsessed’ with Gaga, reports the China Daily.

It’s not the first time Jolie has been accused of cheating on Pitt.

Earlier this week, In Touch Weekly magazine spoke to a housekeeper who worked extensively with the family on their numerous visits to the Waldorf-Astoria in New York.

Anna Kowalski claimed that the actress had a series of steamy sex sessions with one of the dialect coaches she worked with on the set of her movie ‘Salt’