2010’s Biggest Splits!

After 11 years of marriage, the couple confirmed they were separating in October. Arquette later overshared about their relationship issues during two Howard Stern interviews. "David is an entertainer, and I'm sure the people who listen to the radio are entertained by his stories," Cox responded.

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The Twilight actor and McCord split in October after two years of dating. The actress later debuted her latest boy-toy, model Aaron O'Connell, at a Halloween bash in Las Vegas. "Only a couple of guys get a chance with her!" McCord's 90210 costar Matt Lanter joked to Us.

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Parents to daughter Lucia, the couple went their separate ways in April. Before long, taped phone conversations between the exes leaked online. "You offend me on every f***ing level," Gibson screamed at his estranged wife. "I don't want you back….You're not the f***ng woman I want."

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The same day Us Weekly broke the news that Longoria discovered incriminating texts between her husband and a mutual pal, the Desperate Housewives actress filed for divorce in November. "We love each other deeply and pray for each other's happiness," she told Us post-split.

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In May, the Camp Rock 2 costars broke things off after just a few months of dating. "Demi and I knew going into our romantic relationship that it may not be an easy one," Jonas told Us. "It was my choice to breakup, but I love her as a friend...I will continue to be her friend and be there for her."

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Two days after Us broke the news that the singer separated from her husband of nearly five years, Aguilera filed for divorce in October. "There have been a lot of tears and sadness," she told Redbook. "Thankfully, I have my mom and a small group of close friends who are there for me 24/7."

After publicly announcing their engagement on the cover of Us Weekly, the couple (and parents to son Tripp) ended their relationship just a few weeks later. "My mom is not 100 percent backing us up right now," Palin told Us at the time.

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The Gossip Girl costars ended their three-year romance in October. Despite the break-up, actress Jessica Szohr insisted the exes have remained professional on set. "There hasn't been anything different," she told Us. "They're both wonderful people, and I just want the both of them to be happy."

Married in October 2009, the Mad Men actress filed for divorce in September. According to sources, Moss' ties to the Church of Scientology "was as important to her as their marriage, if not more." Armisen later began dating Saturday Night Live costar Abby Elliott.

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The E! Fashion Police critic and her model beau called off their engagement in July. After the breakup, a source tells Us that Osbourne's mother Sharon "wanted to give him a piece of her mind, but Kelly begged her not to. She wants a clean break and to move forward."

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After seven months of courtship, the Bachelor couple confirmed their split in June after Girardi first broke the news to a tabloid. Pavelka later accused her of cheating with Greek actor Gregory Michael, which she denied.

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After Tish reportedly hooked up with rocker Bret Michaels, the country singer (and dad to Miley) filed for divorce from his wife of 17 years. "As you can imagine, this is a very difficult time for our family," the couple told Us in October. "We are trying to work through some personal matters."

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After ending her four-year relationship with her model beau in April, Berry dished on the split to Vogue. "You realize you are not meant to go the distance with everybody," she said of Aubry. "We are back to how it was before: living apart, raising our daughter."

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After nearly nine years together, the couple announced their marriage was over. Parents to twins Miller and Rose, Ethridge alleged that Michaels used their children as "pawns" in an effort to win $12,000 a month in child support.

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In April, the comic star and the Love, Lust & Faking It author ended their five-year relationship. "I'm so grateful for the years Jim and I shared together," McCarthy told Us. "I will continue to be in his daughter's life and will always keep Jim as a leading man in my heart."

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Dating since 2006, a rep for the actress confirmed the couple's split in February. "[Ryan] called her to end the relationship," a source told Us at the time, adding that "they had grown apart." Cornish later moved out of the L.A. home she shared with Phillippe.

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In March, the Oscar-winner and her director husband announced they were calling it quits after seven years of marriage. "The split is entirely amicable and is by mutual agreement," a rep for the couple told Us. "Both parties are fully committed to the future joint parenting of their children."

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The socialite dumped the MTV star in early April. "I just realized that I'm better off without him," Hilton told Us post-split. "I deserve something much better! He wasn't right for me, and I will eventually find somebody who loves me for who I am."

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Cyrus met Hemsworth in 2009 on the set of their romance The Last Song. "We had a lot of fun!" Hemsworth told Us. "It was pretty much jokes every day!" The couple parted ways in August, a rep for the actor confirmed.

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Together since 2008, the one-time Gossip Girl costars ended their relationship in April. "They are still friends," an insider told Us of the exes. "It was amicable. They still talk all the time."

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After three years of dating, the former High School Musical costars called it quits in December. "It was mutual," a source told Us. "They have been together for so long. It just ran its course."

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