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

Katy Perry loves sharing her woman’s world with Lady Gaga. In the crowd at Mother Monster’s ¡Viva La Mayhem! concert in ...

The Little Monster-KatyCat stan wars can stop: these pop divas are friends! On Sunday night, Katy Perry was spotted in the ...

Social media users slammed Katy Perry after the "Thinking of You" singer revealed a spacesuit costume weeks after her Blue ...

Katy Perry has said that she feels “so proud” of Lady Gaga, after attending one of the singer’s shows in Mexico.

Lily Allen apologized to Katy Perry after publicly criticizing the singer's participation in the Blue Origin space flight.

Perry’s new status as the most unpopular woman in pop couldn’t have come at a worse time — right before her first global tour ...