Hollywood will have its fair share of lonely hearts this Christmas after countless couples went their separate ways during 2011. RadarOnline.com reveals the celebrities who have gone through bad breakups and are in need of a helping hand from Cupid and his arrow before Valentine's Day comes around.

CBS Evening News anchor Katie Couric doesn't often find her name in the tabloids but her split from longtime boyfriend Brooks Perlin after five years earlier in December took everyone by surprise. Couric, 54, reportedly initiated the breakup with her 37-year-old beau, and is already looking for a new love!

PHOTOS: Check Out The Biggest Breakups Of The Year

Catching boy toy husband Ashton Kutcher cheating for the second time in just over a year was too much even for Demi Moore! The Striptease star announced she was filing for divorce from the Two And A Half Men actor after details of his drunken hook up in San Diego with Sara Leal emerged in October.

With two adorable twins and a string of hit songs under both their belts, Jennifer Lopez and Marc Anthony's bombshell breakup in July rocked the music world. The couple had been together for seven years but that didn't stop the 42-year-old Jenny From The Block singer quickly moving on to a much younger man by stepping out with 24-year-old back-up singer, Casper Smart.

Ali Fedotowsky didn't help the success record of The Bachelor romances when she announced in November that she and fiancé Roberto Martinez had split up after a year. Within a day of the breakup, The Bachelorette star turned Fox News reporter had already returned her 3-carat asscher-cut diamond engagement ring to the jeweler Neil Lane, RadarOnline.com exclusively revealed.

Possibly one of the least shocking splits of the year was 85-year-old Playboy founder Hugh Hefner and his busty blonde fiancée Crystal Harris who announced they were parting ways just days before their June wedding amid rumors that she was dating Dr. Phil's son, Jordan McGraw. The 24-year-old Playboy playmate quickly packed her bags and moved out of the Mansion, but instead of giving back her huge 3.39 carat diamond ring she put it up for auction!

Arnold Schwarzenegger and Maria Shriver's breakup after 25 years of marriage became one of the biggest stories of the year in every way when a joint investigation by Star magazine and RadarOnline.com revealed in May that he had fathered a love child, who is now 14, with his housekeeper, Mildred Baena. Maria filed for divorce on July 1, and the former California governor, who is worth roughly around $500-750 million dollars, reportedly is agreeing to a generous settlement.

Rumors that beautiful couple Leonardo DiCaprio and Bar Refaeli were on the outs began circulating in May when the Israeli supermodel walked the red carpet alone at the prestigious Met Gala in New York City. It didn't take either side long to bounce back from their on-again-off-again five year fling as Bar was soon linked to David Fischer, while Leo dated Gossip Girl star Blake Lively until October.

Many thought that New York Yankees star Derek Jeter and Minka Kelly's relationship was a home run to the altar but the couple struck out in August and called it quits. 2011 didn't get any better for the former Friday Night Light's star when her new project, Charlie's Angels, became the second network show of the year to be canceled.

They say once a cheater, always a cheater - and Jesse James certainly supports the theory! After his marriage to Sandra Bullock exploded, the Monster Garage star got engaged to tattoo artist Kat Von D. Despite sharing a passion for getting inked, the couple split up in a similar spectacular fashion when Kat announced on Facebook that he had been cheating on her too. In a lengthy Facebook blog titled “Thank You, Jesse James,"  Von D revealed that her relationship with Jesse was “toxic” and that she “encountered” the 19th woman he’d cheated on her with during their relationship.

And, save some sympathy for some other notable romances that suffered a sad demise during 2011!

British actress Elizabeth Hurley and Arun Nayar ended their three-year marriage after her rumored affair with a cricket star; Olivia Wilde and childhood sweetheart hubby, Tao Rusapoli, parted ways after she admitted that she had married too young and notorious lady's man Alex Rodriguez left another broken heart in his wake when he and actress Cameron Diaz split.

You can check out all the biggest break ups of 2011, here on RadarOnline.com.

Elizabeth Hurley has finally filled for divorce from her husband Arun Nayar, four months after announcing they had separated, RadarOnline.com has learned.

The model-turned-actress-turned swimsuit designer filed the paperwork in London Friday citing "unreasonable behavior" on Nayar's part as the cause.

PHOTOS:  Celebrity Cheaters

Elizabeth, 45,  who became famous due to her high profile relationship with actor Hugh Grant, married the Indian born textile heir on March 2 2007.

As RadarOnline.com previously reported, on December 12, 2010 she revealed on her Twitter account that she and Nayar had been separated for several months. The admission followed media reports that she had been engaging in a romantic relationship with Australian cricketer Shane Warne.

PHOTOS:  Hot Celeb Moms

According to the UK's Daily Mail, Hurley never signed a pre-nuptial agreement and could stand to lose a portion of her estimated $21 million fortune.

Since her split, Hurley's resumed her film career.  She's now in Los Angeles shooting Wonder Woman.

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Only a week after a British newspaper published photographs of a married Liz Hurley in a passionate embrace with another man, the actress/model has dumped the pro cricket player...for cheating on her! That's the latest claim by London's News of the World who published video of Hurley and Shane Warne together in their original story.

PHOTOS:  Celebrity Cheaters

Now according to the Daily Mirror Warne was sexting another woman, also married, while simultaneously pursuing Hurley.

PHOTOS:  Celebs Who Have Good Taste In Bikinis & Bad Taste In Men

The other woman (Not including Warne's wife) is Adele Angeleri, the wife of millionaire Australian lawyer and businessman Denis Angeleri.  He went public with the more than 100 messages his wife received from the "horny" cricket superstar, including one he sent on the same day he was texting Hurley.

PHOTOS:  Hot Celeb Moms

As RadarOnline.com reported, after her affair with Warne was exposed, Hurley confessed to her marital woes.  "Not a great day," she Tweeted on December 12.  "For the record, my husband Arun and I separated a few months ago.  Our close family & friends are aware of this."

Hurley and super-rich Arun Nayar were married in 2007.  But if she thought her romantic future was with Warne, she'll have to think again.

PHOTOS:  Celebs Who Broke Up In 2010

"My advice to Liz would be to steer well clear of him," Denis Angeleri said.

Hurley's longest romance was with Hugh Grant.  It ended after 13 years when he was arrested while having oral sex with a hooker.

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Liz Hurley & Husband Split Amid Cheating Scandal

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