California Girl Katy Perry Relaxes By The Pool In A Skimpy Bikini While In Miami

July 29th, 2012 1:18pm EDT

Katy Perry took some time off from her busy schedule promoting her new movie, Katy Perry: Part of Me, to relax in Miami Friday, lounging by the rooftop pool at her hotel in a skimpy green and yellow tie-dyed bikini that showed off plenty of cleavage in front -- and in back, thanks to a pair of low-cut bottoms.

The sexy singer enjoyed her downtime with some friends and even brought her 91-year-old grandmother, who she's been known to take with her to red-carpet events.

Katy recently finalized her divorce from comedian Russell Brand; and now rumors of a new romance are starting, thanks to a story at UsWeekly.com.

Rumor has it Katy was at the Soho House in West Hollywood last month with celebrity lothario John Mayer -- who she reportedly has a big crush on -- and the two spent time together for a few days, with Mayer even going over to her place for pizza one night.

"They were affectionate, holding hands and cuddling," a source told Us Weekly.

But what about her relationship with Florence + the Machine guitarist Robert Ackroyd?

U.K. magazine Heat published an interview with Ackroyd, who confirmed that the couple have been hanging out together a lot, but it's not that serious.

"She's the real deal. She loves London, so I'm just showing her the sights," he said.

Photo Credits: WENN.com; © Manuel Munoz, PacificCoastNews.com

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