Katy Perry Shows Off Killer Beach Bod in Strapless Tie-Dye Bikini

For her afternoon spent poolside Friday, Katy Perry rocked an itsy-bitsy, teeny-weeny, yellow polka -- er, tie-dye bikini.
On vacation with pals in Miami, the pop star, 27, flaunted her amazing curves in a strapless black-and-yellow two-piece. See more pictures here. Perry accessorized her swimsuit with oversized black sunglasses and a long, silver pendant necklace from Jewels by Dunn.

Katy Perry in Miami Beach, Florida on July 27, 2012. Credit: Beauty Legs of Celebrity

One day earlier, Perry went with a classic, super-sexy black bikini to hang out with her friends

Katy Perry in Miami Beach, Florida on July 27, 2012. Credit: Beauty Legs of Celebrity
Since splitting from ex-husband Russell Brand earlier this year, the "Part of Me" singer has been making the most of single life. In addition to casually dating Florence and the Machine rocker Robert Ackroyd, she's also been enjoying nights out in Los Angeles with John Mayer.

On June 19, Perry and Mayer spent the evening together at Soho House in West Hollywood. Says an onlooker, "They were affectionate, holding hands and cuddling!"