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

Katy Perry wore a spacesuit costume while performing days after her Blue Origin space flight. It immediately backfired on her ...

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

Cause you’re hot, then you’re cold. Lily Allen has apologized for “being mean” to Katy Perry over her controversial Blue ...

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

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 ...

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 ...

Shortly after dancing to the Poker Face singer's hits, Katy took to her Instagram Stories to praise the performance.

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

Katy Perry can’t catch a break this month. The pop star has already suffered a handful of Ls in April, mostly due to her ...

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

It was one small step for Katy Perry when she stepped out of a space capsule earlier this month and kissed the Texas terra ...