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 ...

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 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 ...

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 ...

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 ...