Summer is upon us and as we celebrate the long weekend we're looking back at the best celebrity vacations over the years. We'll never forget the time Justin Bieber held Selena Gomez  during their romantic getaway, or when Gwyneth Paltrow  flashed her grin during a family beach day  before she and Chris Martin  split. Of course, the celebration wouldn't be complete without the queen of relaxation Kate Moss  or the bikini-loving Jennifer Aniston . Whether you have plans to hit the beach or relax at a pool, mark the Fourth by taking a look at our favorite stars in the sun! And for even more sexy celebs, check out our ultimate bikini slideshow .
Naomi Watts  and Liev Schreiber  had a laugh while on the beach in Malibu in March 2013.
Michelle Rodriguez got away to Italy in July 2014.
Shirtless  Ben Stiller  and his wife, Christine Taylor, hit the beach in August 2012 while in Kauai with family and friends.
Sarah Jessica Parker  slipped into a navy one-piece swimsuit while on vacation in Kefalonia, Greece, in 2013.
Brooke Burke and her husband, David Charvet, cozied up in the pool in Miami in July 2012.
Megan Fox  and Brian Austin Green  spent the first few days of their June 2010 honeymoon on the beaches of Maui.
Elle Macpherson went boating around Spain with then-boyfriend Roger Jenkins in July 2012.
Whitney Port wore a bikini  for a July 2011 jaunt to Miami.
Paul McCartney and his wife Nancy Shevell hit the beach in Ibiza in June 2014.
Anne Hathaway  had fun in the Miami sun in March 2014.
Olivia Palermo showed PDA with her boyfriend, Johannes Huebl, while in St. Barts in January.
Simon Cowell  greeted someone from his yacht in France in August 2012.
Paul Rudd  showed off his shirtless  bod in Cabo in Aprill 2014.
Miley Cyrus  and Liam Hemsworth watched the sunset in Costa Rica while vacationing in January 2013.
Zac Efron  got shirtless  on a boat while celebrating the Fourth of July in St.-Tropez in 2012.
A shirtless  Hugh Jackman  jogged on the beach in Spain during a getaway in June 2012.
Scarlett Johansson  got her tan on in a white bikini while floating around Sicily in July 2012.
Bella Thorne enjoyed a beach day in Miami in May 2014.
Demi Moore  kicked off 2014 with a new guy, 27-year-old drummer Sean Friday, in Mexico.
Olivia Palermo struck a pose while yachting around Spain in August 2012.
Gwyneth had fun in the water during a New Year's vacation in Hawaii in January.
In April 2014, Heidi Klum  and her beau Vito Schnabel went on a romantic trip to Mexico.
In June 2012, Ryan Seacrest  traveled to St.-Tropez with friends.
During a June trip to Ibiza in 2012, a pregnant Camila Alves wore a bikini, while Matthew McConaughey  went shirtless .
Matt Damon  and Brad Pitt  hung out on a boat on Lake Como while vacationing with family and friends in June 2004.
Jake and Maggie Gyllenhaal escaped to Hawaii  for a few days in July 2011 when their father, Stephen, married Kathleen Man in a romantic Oahu sunset ceremony.
David and Victoria Beckham  took a couple's trip to the Seychelles in July 2009.
Lauren Conrad  showed PDA poolside with William Tell while on a Cabo getaway in July 2012.
Jennifer Lopez  and Casper Smart looked lovingly at each other while taking a pool dip in Miami in August 2012.
Allison Williams relaxed in a black bikini while in Miami in February 2013.
Jennifer Aniston  gave fiancé Justin Theroux a steamy kiss in the jacuzzi during their Mexican getaway in August 2013.
Following a European honeymoon, Reese Witherspoon and Jim Toth spent time in Hawaii  in September 2011.
Hayden Panettiere  vacationed with friends in July 2012 in Mexico.
In April 2014, Sam Claflin splashed around with his wife, Lauren Haddock, in Hawaii.
Bradley Cooper  and Suki Waterhouse cozied up in the ocean together while in Hawaii in September 2013.
Doutzen Kroes spent time with her husband, Sunnery James, and friends at the beach in Miami in August 2012.
Eduardo Cruz and Eva Longoria visited Spain  during their July 2011 getaway.
Sofia Vergara hit the beach in Mykonos while wearing a maxi skirt in July 2013.
Jennifer Aniston  and Justin Theroux soaked up the sun in Cabo in December 2012.
Kate Moss  and Jamie Hince jumped into the Mediterranean during their July 2012 vacation in the South of France.
Alessandra Ambrosio paddleboarded in a bikini  while in Hawaii in September 2011.
Rihanna  went parasailing with friends in St.-Tropez in July 2012.
Julia Roberts went to Hawaii  with her husband, Danny Moder, and their kids in August 2011.
Cameron Diaz  mixed business with pleasure in St. Barts in February, getting her hair wet during a photo shoot.
Kate and Pippa Middleton lounged on a boat in the Mediterranean Sea wearing white bikinis during a September 2006 trip.
Olivia Wilde  and Jason Sudeikis got away to Hawaii over Memorial Day weekend in 2013, locking lips during a daytime swim.
Cougar Town's Josh Hopkins went to Hawaii in June 2012.
Diddy  played around in the St. Bart's water in December 2012 during a family vacation.
Justin Bieber and Selena Gomez  coordinated a break in their busy schedules to vacation in Hawaii together back in May 2011 .
In March 2013, Ellie Goulding wore a bikini and denim shorts to relax poolside in Miami.
Eric Johnson and Jessica Simpson  held hands as they walked on the beach in Hawaii in December 2012.
Vanessa Paradis wore a black bikini while in the South of France in August 2012.
Channing Tatum  and Jenna Dewan floated in the water together during a July 2010 Italian getaway.
Jessica Biel  went swimming in Puerto Rico while visiting Justin Timberlake  there in June 2012.
Paris Hilton  and her new man cooled off in the water on an Italian island in August 2012.
Matt Damon  and his wife, Luciana, hit the beach with Jennifer Garner  during a group trip to Hawaii in July 2007.
Drew Barrymore  wore a retro polka-dot bikini during a March 2013 girls' getaway in Mexico.
Liam Hemsworth carried his surfboard on the beach in Costa Rica in January 2013.
Leonardo DiCaprio  went shirtless  on a boat when he relaxed in Ibiza in August 2013.
Olivia Palermo's boyfriend, Johanne Huebl, tried to fix their broken beach umbrella while they vacationed together in St. Barts in January 2013.
Julianne Hough and then-boyfriend Ryan Seacrest  vacationed together in St. Barts during a January 2013 getaway.
Jessica Alba  sported a skimpy orange bikini while in Mexico with her family in January 2013.
Jennifer Lawrence hit the beach in Hawaii with her brother in November 2012.
Kristen Bell  took a dip in the Pacific Ocean while on a June 2009 Hawaiian vacation with Dax Shepard.
A pregnant Gisele Bundchen  tanned on the beach in Miami with a friend in November 2012.
Nicole Richie  and friends went on a wild golf cart adventure while logging girls' time in Cabo in September 2012.
Julianne Hough hung out on the beach in Malibu with her dogs in July 2012.
Kate Hudson  let loose on a yacht in the South of France in June 2012.
Geri Halliwell wore a bikini  off the coast of France following her split with boyfriend Henry Beckwith in August 2011.
Cristiano Ronaldo and Irina Shayk cuddled up in St.-Tropez during a trip in July 2012.