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

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

Katy Perry is singing the praises of fellow pop superstar Lady Gaga after catching her brand new tour. The "Firework" singer ...

Katy Perry was spotted in the crowd watching Lady Gaga in Mexico City after her own tour was hit with disaster as she was ...

Lady Gaga came back to perform in Mexico City after a 13-year-long break, and Katy Perry was there to support her.

Katy Perry has gushed about fellow pop star Lady Gaga. In addition to her kind words, the Last Friday Night singer shared a ...

Katy Perry enjoyed an evening at Lady Gaga’s Mayhem Tour in Mexico City, praising the 14-time Grammy award winner on putting ...

A seemingly innocuous social media post from Kesha has led some fans to ponder whether she’s throwing shade at Katy Perry. In ...

Katy Perry’s comeback has not gone to plan. But the one thing that will save her now is not disappearing, but riding on the ...

Lady Gaga starts off her international tour by reading an emotional letter to her fans, followed by the debut of 'Blade of Grass,' which she wrote for her fiancé, Michael Polansky. Katy Perry, who's ...

Lady Gaga and Katy Perry attend the Academy Museum of Motion Pictures: Opening Gala honoring Haile Gerima and Sophia Loren, ...

Katy Perry took a break from her own tour to show some love for Lady Gaga during a packed concert in Mexico City over the ...