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

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

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

At her most recent Lifetimes Tour show, Katy Perry shared an "emotional" moment with her fans in the wake of the heavy ...

Katy Perry has revealed why she hasn't been able to perform at her best after kicking off her "Lifetimes" tour on Wednesday ...

Katy Perry is being roasted by fans over her bizarre space-inspired outfit from her Lifetimes Tour. The singer, 40, rocked ...

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

Lady Gaga starts off her international tour by reading an emotional letter to her fans, followed by the debut of 'Blade of ...

Katy Perry’s performance was from a whole ‘nother world. The singer, 40, kicked off her “Lifetimes” tour in Mexico City, ...

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

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

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 ...