While the performers were on stage, Katy and RiRi were out to play.
Katy Perry, Mariah Carey and more dress up as other women in new magazine spread.
Taylor shades Katy Perry in concert.
The relationship saga of Katy and John Mayer never ends.
GUYS. Let the kween speak for herself.
She’s just one boss lady.
Imitation is the sincerest form of flattery.
Madonna is not shy to shade!