Who in Hollywood has the most toned tush? Well, we're about to tell you! If you're feeling envious, just remember that even these celebrities work hard to keep their hineys fit and tiny. This Summer, implement these celebrity-certified exercises to firm up and slim down your backside. Source: Flynet Read more

Scarlett Johansson broke out her bikini and hit the beach in Hawaii Friday with boyfriend Nate Naylor. The couple relaxed under the sun, and Nate even rubbed suntan lotion onto Scarlett's back. The tropical getaway comes on the heels of Scarlett's recent trip to Berlin and an appearance at Obama's "Runway to Win" fundraiser in NYC earlier this week. Nate and Scarlett went public with their Read more

Jennifer Aniston turns 43 years old today! She celebrated her birthday with a trip to Mexico in 2010, but last year she ditched the two-piece for dinner in NYC with friends. We haven't seen her hit the beach lately, since she's been busy traveling between LA and NYC with new boyfriend Justin Theroux. The duo connected back in 2010 while working on Wanderlust, which hits theaters later this month. Read more

Venice Beach got a star-studded dose of fun when Ashley Tisdale, Sarah Hyland, Austin Stowell, and Matt Lanter hit the sand for a photo shoot yesterday. Sarah, who was on a break from filming Modern Family, and Ashley wore bikinis and other beachwear while Matt and Austin rode bikes in flip-flops. It was an especially exciting afternoon for Sarah since she was celebrating her two-year anniversary Read more

Miranda Kerr lounged in a bikini poolside with friends in Sydney on Monday. She was joined by her shirtless husband, Orlando Bloom, son Flynn, and a few pals for the sunny afternoon. Miranda and her girlfriends sipped drinks while Orlando took Flynn for a dip in the water. For the past week, Miranda's been Down Under, where she posed for a British Vogue shoot and hit the red carpet for the AACTA Read more

Emma Stone wore a bikini to take a dip in the pool of her Rio hotel over the weekend. She's in Brazil to promote The Amazing Spider-Man, and dressed up to meet with fans and snap promotional pictures during her stay. She also made time for sightseeing when she checked out the Rodrigo de Freitas lagoon. Emma's action film doesn't hit theaters until July, but we got a glimpse of her hot chemistry Read more

Bikini-clad Kourtney Kardashian, boyfriend Scott Disick, and son Mason escaped their hectic schedules in LA for a few days and headed south of the border to Mexico last month for a family vacation. Kourtney sunned her baby bump in colorful two-piece suits while Scott and Mason wore bright swim trunks. Scott and Kourtney turned up the PDA on a romantic stroll and spent a fun afternoon on the beach Read more

Kate Hudson flaunted her bikini body poolside in Mexico yesterday. She's vacationing with fiancé Matthew Bellamy, who lounged in his bathrobe and sipped on a cold drink. Bingham and Ryder weren't spotted with Kate and Matthew, who chatted on the patio. It's been less than a year since Kate gave birth to baby Bingham, though she already slipped into a bikini last Sept., just two months after Read more

Prince William and his wife Kate spent the last week together on vacation with her family in Mustique. The couple spent a few days on the West Indies island with her sister Pippa, brother James, and parents Michael and Carole. William apparently met up with the group after the Middletons started their fun. He arrived, however, ahead of the celebrations for Carole Middleton's 57th birthday. The Read more

LeAnn Rimes wore a bikini yesterday for a celebration in Malibu. She met up with her girlfriends to watch the sunset on the beach after a recent surgery. LeAnn's apparently been dealing with some discomfort that she described as "jaw pain [that] makes your whole head pound." Yesterday, though, she was in top form to lounge with her pals. She tweeted, "The pain is subsiding finally for a moment. Read more