She's always been in good shape. But yesterday Katy Perry showed off the results of her tough diet and exercise regime ahead of her wedding to Russell Brand as she enjoyed the slides at a water park in the Bahamas with friends. The 25-year-old singer looked toned and svelte in a black and white bikini with red ribbon embellishments as she made her way around Atlantis Paradise Island in Nassau.

Giggling with friends, Katy appeared to be making the most of her free time after performing a sell-out concert at the resort's Grand Ballroom. She waved to fans as she enjoyed the attractions at the water park with an entourage which included her brother David Hudson, her assistant Suzanne Sansone and stylist Logan Horne.