Katy Perry and Lady Gaga. Friends? Rivals? Maybe the only time these pop divas have been mentioned in the same sentence recently is when Perry went to see Gaga’s Mexico City concert in April.

Katy Perry was spotted in the crowd at Lady Gaga's concert in Mexico City, a day after Perry's own performance. Perry shared a sweet message for Gaga.

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 ...

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

Katy Perry is singing the praises of fellow pop superstar Lady Gaga after catching her brand new tour.. The "Firework" singer took to her Instagram Stories on Monday (April 28) to share some of ...

Lady Gaga and Katy Perry - Credit: Kevin Mazur/WireImage for Live Nation; Kevin Mazur/Getty Images for Katy Perry. The Little Monster-KatyCat stan wars can stop: these pop divas are friends!

Katy Perry and Lady Gaga. Friends? Rivals? Maybe the only time these pop divas have been mentioned in the same sentence recently is when Perry went to see Gaga’s Mexico City concert in April.

On her Instagram, Perry shared clips of Gaga's "Abracadabra" performance, along with a clip of herself dancing to the song with Glucksman and Hudson.(Hudson and Perry co-wrote "Dark Horse," "Swish ...

Katy Perry joined in on the Viva La Mayhem fun!. On Monday, April 28, the "Teenage Dream" singer shared pictures and videos from Lady Gaga's Sunday night concert in Mexico City at Estadio GNP ...