Kim and Kourtney Kardashian make a splash a deux!

Jake Gyllenhaal strips down with his big sister Maggie!

Kate and Pippa Middleton are sexy sisters with similar taste in swimsuits.

Julianne Hough has more in common with her brother Derek than Dancing skills
– the siblings both have rockin’ beach bods.

Petra and Tamara Ecclestone are smoking heiresses with loaded bank accounts
– and filled out bikini tops.

Zac Efron flaunts his fabulous beach body – and younger bro Dylan – on the
beach!

Lindsay and Ali Lohan bare there bikini bods on the beach.

Dancing with the Stars pro Cheryl Burke and her sister Nicole Wolf have
equally sexy hard bodies.

Monica and Penelope Cruz are sizzling hot Spanish sisters.

Avril Lavigne brings her bro Matt to the beach.

Hilary and Haylie Duff are Hollywood hotties who love steaming up the
shoreline together.

Luke Wilson hangs out with his big, abfab bro Andrew at the beach.

Kate Hudson and her hunky brother Oliver spend some quality time poolside.

AnnaLynne McCord steams up the 90210 zipcode solo, but when she brings along
her sexy sis Angel, the duo scorch up the sand!

Joanna Krupa and her sister Marta both have swerving curves.

A.J. Lamas scoops up his sexy sis Shayne on the beach.