The 39-year-old pop superstar joined Mia, 40, who made her debut DJ set at Coachella's iconic Do Lab Stage in Indio, California. Katy wore Mia's custom bikini T-shirt from her limited edition Coachella merchandise to show her support. The Firework singer took the mic at one point and also shot Mia Moretti-branded $100 dollar bills from a money gun to the delight of the crowd Read this story
