Just like many regular couples, relationships in Hollywood are anything but smooth sailing (just ask Tom Cruise and Katie Holmes). From busy schedules, bicoastal lives and the never-ending rumor mill, it seems it's hard to keep any relationship off the rocks in Tinseltown.

But not all breakups are forever.

Most recently, on-again, off-again couple Elisabetta Canalis -- who once dated George Clooney -- and "Jackass" star Steve-O were spotted together in West Hollywood last week, just a few months after calling it quits. The couple first started dating in early 2012, but parted ways a few months later.

If Canalis and Steve-O are indeed rekindling their romance, they certainly won't be the first celebrity couple to do so.

Check out some celebrity couples who have broken up and reunited:

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  • Reunited Celebrity Couples

    Pink and Carey Hart married in 2006, but announced their separation in 2008. After marriage counseling and cathartic song therapy (Hart appeared in Pink's "So What" music video, which was about their split), they reunited in 2010 and welcomed daughter Willow Sage in June 2011.

  • Reunited Celebrity Couples

    Megan Fox and Brian Austin Green first got together in 2004 (she was 18, he was 30) and were engaged by 2006, only to split in 2009. However, it looks as if their love might be meant to last. The couple reunited and married in 2010 -- and they are now expecting their first child together later this year.

  • Reunited Celebrity Couples

    Nick Lachey and Vanessa Minnillo are expecting their first child this year, but their relationship wasn't always smooth sailing. The couple started dating in 2006, but split for a few months in 2009. They finally tied the knot in August 2011 and currently have a baby on the way.

  • Reunited Celebrity Couples

    Kristin Cavallari and Jay Cutler began dating in 2010 and after one broken engagement in July 2011 -- and an ill-timed wedding dress photo shoot -- the couple are engaged once again and expecting their first child together.

  • Reunited Celebrity Couples

    Kourtney Kardashian's relationship with longtime beau Scott Disick has played on E!'s reality shows and we've seen them together, apart and finally together again since beginning their relationship in 2007. They currently have one son together and are expecting a baby girl this summer.

  • Reunited Celebrity Couples

    Rachel Bilson and Hayden Christensen met in 2007 and became engaged in 2008. However, they called it quits in 2010, only to reconcile a short time later. They're still together, but it seems there's no wedding -- or engagement -- in sight.

  • Reunited Celebrity Couples

    Miley Cyrus' parents, Billy Ray and Tish, hit a rough patch in 2010, after almost 17 years of marriage. Billy Ray filed for divorce in October 2010, but revealed in March 2011 that the filing had been dropped and he was back together with his wife.

  • Reunited Celebrity Couples

    Prince William and Kate Middleton had a storybook wedding, but their relationship was far from perfect. They met at the University of St. Andrews in 2001 and began dating a few years later, but called it quits in 2007. However, this fairytale has a happy ending -- they tied the knot in April 2011.

  • Reunited Celebrity Couples

    Justin Timberlake and Jessica Biel are set to tie the knot as soon as this summer, but there was a time when things weren't so happy for these two. The couple began dating in 2007 but split in March 2011. It seems distance made their hearts grow fonder -- they are back on and reportedly engaged.

  • Reunited Celebrity Couples

    Miley Cyrus and Liam Hemsworth began dating after they met on the set of their film, "The Last Song," in 2009. However, they split in August 2010, got back together, and split once again that November. But this story has a happy ending. The couple rekindled their romance and announced their engagement in June 2012.

  • Reunited Celebrity Couples

    "Modern Family" star Sofia Vergara called things off with her businessman boyfriend Nick Loeb in May 2012, but they seemed to quickly patch things up. They were all smiles when they were spotted out together in June.

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