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

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

The Little Monster-KatyCat stan wars can stop: these pop divas are friends! On Sunday night, Katy Perry was spotted in the crowd at Lady Gaga's concert in Mexico City, a day after Perry's performance ...

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

But that musical milestone in space history could have looked very different, because Katy Perry isn't the first performer with space ambitions. In fact, megastars Lance Bass, Beyonce, Lady Gaga and ...

During each event, fans can scan a QR code from one of her albums and vote on a song they want her to perform The US leg of ...

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

Selena Gomez, Ariana Grande, Lady Gaga and Kendrick Lamar each scored a leading four nominations each for the Nickelodeon Kids’ Choice Awards, while Jack Black, Dwayne Johnson and Jelly Roll collected ...

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" singer was one of tens of ...