Scarlett Johansson, Ryan Reynolds And More 2010 Breakups

Zac Efron and Vanessa Hudgens, Joe Jonas and Demi Lovato and more broke our hearts when they broke up this year.

Sure there was lots of love this year, but 2010 more likely will be remembered for its many surprising celebrity breakups. Some of Hollywood's seemingly most stalwart duos decided to part ways this year. So, as the final days of 2010 wind down, MTV News takes a look back on some of the year's most shocking splits.

[url id=""]Joe Jonas and Demi Lovato[/url]

In March, [article id="1633905"]Jonas and Lovato[/article] copped to dating one another after months of speculation. Weeks later the pair would open up for the first time about taking their [article id="1634743"]"Camp Rock" relationship[/article] offscreen.

As summer approached, the pair began to promote their joint ventures, [article id="1639248"]"Camp Rock 2," and their summer tour[/article] together. However, by May they had split. Still, the youthful twosome [article id="1644352"]pledged that touring together wouldn't be awkward[/article]. Eventually, [article id="1651297"]Lovato left the tour[/article] to seek treatment for personal reasons, and well, Jonas hasn't been shy about his affections for Ashley Greene. We can't help but hope he and Demi can let bygones be bygones.

[url id=""]Courteney Cox and David Arquette[/url]

[article id="1649757"]Cox and Arquette[/article] shocked the world when they split in October after 11 years of marriage. Things quickly got weird when [article id="1649805"]Arquette appeared on Howard Stern's radio show[/article] and dished about the split and his emotional state in a post-Cox world. The bottom line is we expect them to have to reunite once [article id="1649757"] "Scream 4"[/article] hits theaters in 2011. We hope things end better for Gale and Dewey.

[url id=""]Kim Kardashian and Reggie Bush[/url]

If a reality-TV starlet and a pro football star can't make it, then who can? After battling engagement and pregnancy rumors, Kardashian and Bush called it quits in March after dating for three years. Kim seems to be recovering just fine in the love department, with speculation swirling that she's dated Halle Berry's ex Gabriel Aubry and [article id="1654109"]Kanye West[/article]. Not too shabby, Miss Kardashian.

[url id=""]Zac Efron and Vanessa Hudgens[/url]

Say it isn't so! [article id="1654165"]Efron and Hudgens[/article] snuck this split in right as the year was getting sleepy and coming to an end. In mid-December, news broke that the longtime lovebirds had split amicably, shocking "High School Musical" fans everywhere. In the weeks since the split, Efron has been busy filming his latest flick, "The Lucky One," while [article id="1654619"]Hudgens celebrated her 22nd birthday[/article] in Las Vegas and assured the world she's doing great.

[url id=""]Scarlett Johansson and Ryan Reynolds[/url]

As news of the Efron/Hudgens breakup broke, the world was almost simultaneously stunned when [article id="1654301"]ScarJo and Reynolds[/article] announced that they too had split. The pair, who claimed that they still felt like newlyweds after two years of wedded bliss, decided to pull the plug on their marriage and focus on life separately, leaving a gaping hole in the planet's collective hottest couple list.

Which 2010 celebrity breakup shocked or saddened you the most? Share your thoughts in the comments below.