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 on Saturday night (April 26) she held her first concert in 13 ...

Lady Gaga will embark on an arena tour this summer. (Kevin Mazur/Getty Images for Coachella) ...