Celebrity Breakover Hairstyles: Then and Now

Just a few months before announcing her split to hubby Pete Wentz, Ashlee Simpson-Wentz cropped her hair into a pixie cut and bleached it blonde.

Always edgy, Rihanna was known for her trendy black bob when she was dating Chris Brown.

See more of Rihanna's hairstyles.

These days, Rihanna is red-hot (literally!). She's gone firetruck red with Rapunzel-length strands. P.S. - check out that moon mani!

Jessica Biel was in love and sporting light honey-colored locks here at a 2007 premiere for I Now Pronounce You Chuck and Larry in the early days of her and Justin Timberlake's relationship.

Perhaps the new hue was reflecting the dark times ahead. Jessica Biel and Justin Timberlake ended things just five months after this somber color change.

Always a red carpet success, Olivia Wilde made it a point to look glamorous and polished while she was married to Italian Prince Tao Ruspoli.

Throwing her staple strands out the door, Olivia Wilde added some edgy fringe just in time for the 2011 Golden Globes and her split from her husband in February.

ScarJo rocked some serious bombshell hair at the 2010 MTV Movie Awards. Ryan Reynolds might have been named "Sexiest Man Alive," but this look screamed, "I know, Ryan Reynolds is one lucky guy."

See more of Scarlett Johansson's hairstyles.

After a huge Golden Globes fail, ScarJo made her mark once again on the red carpet at the 2011 Oscars, creating a lot of buzz around her hair and love life.

She was considered Queen of the Pixies when Shia LaBeouf was her main squeeze, here at the 2010 Oscars.

See more of Carey Mulligan's hairstyles.

Since splitting in October 2010, Carey Mulligan has been trying to grow some longer locks.

Always one for a center part, Sandra Bullock kept her look fresh and young at the 2010 MTV Movie Awards.

See more of Sandra Bullock's hairstyles.

It took a little while, but eventually Sandra Bullock traded in her old style for some new bangs and a deeper hue to walk down the red carpet with instead of ex-husband Jesse James.

Looks like Rumer Willis's model boyfriend Micah Alberti taught her how to pose donning a fishtail brad and reddish tint here at the 2009 Teen Choice Awards.

Since their split in October 2010, Rumer Willis's hair keeps getting shorter, brighter, and more wild.

After an altercation with a backup dancer while on tour with the Jonas Brothers, Lovato entered rehab for "physical and emotional issues" in November 2010. Released in January 2011, Lovato told Seventeen, "I basically had a nervous breakdown." After addressing lifelong issues with eating disorders, Lovato is now a spokesperson for the Jed Foundation’s “Love is Louder Than the Pressure to Be Perfect” campaign.

After a stint in rehab for emotional issues, Demi Lovato resurfaced single and with this chocolate color in 2011.

The couple that gets their hair cut together, stays together? Kelly Osbourne and her boyfriend Luke Worrall wore almost identical hairstyles in 2009.

From a woman scorned to a fashion expert, the newly dubbed Fashion Police commentator looks gorgeous with shoulder-length strands post breakup.

When Halle Berry started dating Gabriel Aubry she had bombshell shiny curls, here at the 2008 Annual ELLE Women in Hollywood event.

See more of Halle Berry's hairstyles.

It seems like Halle Berry's hair got shorter with her patience by the end of her four year relationship, as she now sticks to this sexy pixie.

While Rachel Bilson and Hayden Christensen were quite the buzz, her hair was rather blah in 2009 at an anniversary party for 3.1 Phillip Lim.

See more of Rachel Bilson's hairstyles.

Maybe second times the charm? Rachel Bilson has been spotted with Hayden once again, this time sporting the ombré trend.