Katy Perry joined in on the Viva La Mayhem fun!. On Monday, April 28, the "Teenage Dream" singer shared pictures and videos from Lady Gaga's Sunday night concert in Mexico City at Estadio GNP ...

Lady Gaga and Katy Perry - Credit: Kevin Mazur/WireImage for Live Nation; Kevin Mazur/Getty Images for Katy Perry. The Little Monster-KatyCat stan wars can stop: these pop divas are friends!

Lady Gaga's fans had their heart in their mouths after the pop star had a scary blunder while she was performing in Las Vegas ...

Lady Gaga was the latest artist to experience an onstage glitch. The actress and singer has been on tour over the past weeks, ...

Aside from the singer's small slip, the Mayhem Ball tour has kicked off without a hitch. Gaga opened the trek July 16 in ...

Lady Gaga fell to the ground just inches away from fans during an awkward slip-up at her Las Vegas concert over the weekend.

Fun guitarist Jack Antonoff, 30, thinks there is a lot of terrible music out there, but not Taylor Swift. "There's a lot of junk. People have to spread out and find more interesting stuff, because ...

The Complete Collection, which earned five #1 singles on the music charts, is climbing up the charts once more.

Katy Perry brought her Lifetimes Tour to PHX Arena on July 12. It was a sci-fi fever dream with "Roar," "Firework," "I Kissed a Girl" and more hits.

Katy Perry loves sharing her woman’s world with Lady Gaga.In the crowd at Mother Monster’s ¡Viva La Mayhem! concert in Mexico City Saturday (April 26), the “Firework” singer was one of ...