Hollywood's famous for its love-em-and-leave-em mentality when it comes to romance, so it's not always shocking when a celebrity couple calls it quits. Yet, 2010 seems to be chock-full of jaw-dropping breakups. We didn't think it could get anymore surprising than the separation of Courteney Cox and David Arquette after 11 years of marriage...but then this week happened. Not only did childhood sweethearts Zac Efron and Vanessa Hudgens part ways, but famously low-key (and completely gorgeous) couple Ryan Reynolds and Scarlett Johansson announced the end of their two-year marriage. Let's just hope this is the end of star splits for 2010.
Was Ryan and Scarlett's breakup this year's most surprising? Vote in our poll after the jump and tell us which of 2010's celebrity splits was most shocking.