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 ...

Lady Gaga unleashed her divine chaos in Mexico City, where she held her first concert in 13 years on April 26.

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

The gigs — part of Gaga’s global Mayhem Ball tour — will happen July 28 and 29 and Aug. 1 and 2 behind her “Mayhem” LP, which ...

Lady Gaga has added new concerts to her official 'Mayhem Ball' tour, now stopping in San Francisco and Los Angeles, as well ...

A few days after headlining the stage at the Coachella Music Festival, Lady Gaga announced she is bringing her Mayhem Ball ...

After stealing the show at Coachella, Lady Gaga is bringing her Mayhem Ball tour to San Francisco's Chase Center.

Lady Gaga has added seven additional dates to her forthcoming Mayhem Ball tour. The pop star will headline the Chase Center ...

Here’s how to get tickets to see Lady Gaga and the MAYHEM Ball Tour concerts at Chase Center in San Francisco, Kia Forum in ...

Use precise geolocation data and actively scan device characteristics for identification. This is done to store and access ...

Lady Gaga finally revealed Mayhem Ball tour dates for the West Coast, adding seven new San Francisco and Los Angeles shows ...