Katy Perry and Lady Gaga. Friends? Rivals? Maybe the only time these pop divas have been mentioned in the same sentence ...

Katy Perry supported Lady Gaga at her Mexico City concert on Sunday, April 27, days after Perry launched her Lifetimes Tour.

On Sunday night, Katy Perry was spotted in the crowd at Lady Gaga‘s concert in Mexico City, a day after Perry’s performance there. Little Monsters spotted Perry at Estadio GNP Seguros as she ...

By Hannah Dailey 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 ...

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 Seguros.

Selena Gomez, Ariana Grande, Lady Gaga and Kendrick Lamar each scored a leading four nominations each for the Nickelodeon ...