Thu, 31 December 2009 22:25:00 ET
From Megan Fox and Brian Austin Green to Jessica Simpson and Tony Romo, these celebrity couples had met the parents, got engaged and even planned a wedding when they suddenly called it quits.
Having romance often adds spices into someone's life. However, keeping affair of the heart on fire is not as easy as it's seen. That goes also for some Hollywood celebrities who seem to have had everything in life. While they are considered to be successful in their professional lives, their romances may not go as smoothly as their careers.
Providing a flashback to celebrities' love lives that were abruptly ended in the past 12 months, Celebrity Mania presents its readers a list of the Top 10 Most Shocking Celebrities' Splits in 2009. Though people were shocked when first learning that the dating couples called it quits, fans might be relieved with the fact that some of the pairs have rekindled their romances.
#10 Paris Hilton and Doug Reinhardt

In early June 2009, less than two weeks after they suggested they were ready to take their relationship to the next level by meeting the parents,
Paris Hilton and Doug Reinhardt called it quits. The hotel heiress, who once believed that the former "The Hills" star will be her future husband, was said dumping him after they had a big argument and she realized that "he was only dating her for publicity." Nevertheless, the pair proved that they can hardly be separated from one another. In late July, Paris and Doug eventually rekindled their romance.
#9 Megan Fox and Brian Austin Green
Megan Fox and
Brian Austin Green seemed trying very hard to maintain their 5-year relationship. In fact, the couple has used counseling service in March to find solution for their problems. Though a friend of the engaged couple said they "are very much in love and plan to be together for a long time," the pair evidently could not avoid separation. In June, the "
Transformers" beauty revealed she had dumped her fiance, saying "I'm currently what you would call single." Still, the twosome was later on spotted spending time together in frequent outings.
#8 Hayden Panettiere and Milo Ventimiglia

Things got serious between
Hayden Panettiere and
Milo Ventimiglia just two months after they were first reported dating. During the December 2007 holiday, the 20-year-old beauty introduced him to her family. Later, in July 2008, the actor reportedly planned to propose to his "Heroes" co-star. While their romance had been far from gossip for several months, the 20-year-old beauty was surprisingly caught making out with another celebrity hunk,
Jesse McCartney, in February 2009. Less than a month later, a source close to the couple confirmed that they have ended their romance, citing "lifestyle conflicts" as the reason for the split.
#7 Katy Perry and Travis McCoy
Katy Perry made it clear that she was no longer with
Travis McCoy by stepping out from her new beau
Russell Brand's London pad in October 2009. Ironically, the month before, the "I Kissed a Girl" singer and the Gym Class Heores' lead vocalist were rumored to have been engaged. At that time, Katy, who rekindled her romance with Travis four months after they first broke up in December 2008, flashed a shiny diamond ring on her engagement finger during a night outing. Though she never confirmed her split from the band's member, the 25-year-old beauty has taken her relationship with new man Russell to the next level by introducing him to her parents.
#6 Nick Lachey and Vanessa Minnillo

In June 2009,
Vanessa Minnillo hinted she was ready to take her relationship with
Nick Lachey to the next level by revealing her dream 10-carat wedding ring. Unfortunately, later that month the pair abruptly ended their romance. The former 98 Degrees' member and the 1998 Miss Teen USA, who moved in together less than a year after first dating in June 2006, were previously still going strong amidst rumors that their relationship was in trouble. Though so, few months after their separation was confirmed, Nick announced that he and the 29-year-old beauty have "patched things up."
#5 Jennifer Love Hewitt and Ross McCall

Said moving forward their nuptials to autumn 2008 in order to save the Scottish actor from being deported from the U.S. as he stayed with a non-resident work visa,
Jennifer Love Hewitt and Ross McCall never made their wedding a reality. The lovebirds, who got engaged in November 2007 after dating for two years, called off their romance during their December 2008 holiday. Their split reportedly surprised their friends seeing that the couple "seemed really happy." However, it was not until early January that the break-up news was finally revealed.
#4 Kim Kardashian and Reggie Bush
Kim Kardashian had picked her engagement ring before she called off her romance with
Reggie Bush in late July 2009. The couple, who admitted they were "very sad" about their break-up, was said ending their two-year relationship because of their alleged secret affairs. Kim was said cheating on Reggie with
Kanye West, while the athlete reportedly cheated on Kim with Latino model Carmen Ortega. In early October, however, the celebrity socialite confirmed that she has reunited with the NFL player. Since then, their love life has been far from gossip.
#3 Jessica Simpson and Tony Romo
Jessica Simpson believed
Tony Romo would be her future baby's daddy. Unfortunately, she was dumped by him just a day before her 29th birthday in July. The split news came out as a surprise since the pair never hinted that their relationship was on the rock since they first dated in November 2007. Moreover, they had sparked engagement rumors for several times after they reportedly went for ring shopping and talked about winter wedding. Explaining the reason for their break-up, a source said, "She loves Tony. But it's been difficult lately. He's busy with his career and she's getting ready to shoot her show ('The Price of Beauty')."
#2 Karina Smirnoff and Maksim Chmerkovskiy

Being engaged on December 31, 2008,
Karina Smirnoff and
Maksim Chmerkovskiy planned to tie the knot in June 2010. Unfortunately, the "Dancing with the Stars" dancers' wedding plan didn't come into materialization as the pair abruptly called off their engagement. Announcing the sad news was a representative for the 31-year-old beauty, who said in September 2009, "I am confirming that they did indeed break up." Admitting "it's a little rough" for him after the break-up, the Ukraine guy later on stated he is no longer friends with Karina, whom he had reportedly known for 15 years before they began dating in late 2008.
#1 Chris Brown and Rihanna

It is so sad that
Rihanna and
Chris Brown, who played coy about their fling despite pictures that showed them engaging in some PDA, had to end it because of domestic violence. On February 8, the R&B singers were involved in serious argument which led the "With You" hitmaker to attack his girlfriend of a year. Though the Barbadian beauty gave him a second chance soon after the altercation, they decided to take a break in March. The two have since remained estranged, especially since Chris got a restraining order that demands him to stay away from the "Umbrella" songstress for five years.
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