Katy Perry wore a bikini  to lounge by the pool with friends, sip drinks, check her iPhone, and work on her tan in Miami on Friday. She has been in Florida for a few days. Katy was spotted reading Robert Pattinson's BlackBook  issue during another poolside afternoon earlier this week. Katy is not among the many celebrities who commented publicly about the Kristen Stewart  cheating scandal, though she is good friends with both Robert and Kristen. Katy's own love life is back in the headlines as well, since she was reportedly spotted getting close to John Mayer  recently in LA.