Celeb Couples Upgrade or Downgrade. Change for the better? When it comes to love, this isn't always the case. Have a look at some celebs who traded in one famous significant other for another, and judge for yourself whether the switch was an upgrade or a downgrade.

Take Kim Kardashian. She has gotten her hands on more athletes than a sports massage therapist. But soon, she will be closing the deal with New Jersey Nets forward Kris Humphries. Is this guy a better teammate than Kim's previous beau, Cowboys receiver Miles Austin.

George Clooney's bedroom has a revolving door, and eventually, the time came when he bid farewell to girlfriend Elisabetta Canalis. Just recently, the rumor mill has been churning that he has taken up with Stacy Kiebler (inset), pro wrestler-turned-actress-turned-"Dancing With the Stars"-er. For the sake of this gallery, let's just say the rumors are true...

A few months ago, Oscar-nominated director Darren Aronofsky (inset) seemed to have it all -- including a son with his longtime partner and fellow Academy darling Rachel Weisz. But while she was filming "Dream House," Rachel fell for her dapper co-star, Daniel Craig -- and raced with him to the altar soon after ditching Darren.

The gossip is that Jennifer Aniston is making a mad dash for the altar with her new boyfriend, Justin Theroux. But even if they do end up exchanging vows and rings, Aniston's fans will always compare her new man to her most famous ex, Brad Pitt.

Halle Berry's current relationship with Olivier Martinez may be one of the most gorgeous pairings in all of Hollywood, but the relationship is still overshadowed by her ex Gabriel Aubry (inset), with whom she's having a protracted custody fight. While their battle over their daughter has turned nasty, Aubry is also superhumanly good-looking.

Carey Mulligan and Shia LaBeouf made big news when they fell for each other on the set of their film "Wall Street: Money Never Sleeps." But they eventually split and now the fashion-forward Mulligan is reportedly engaged to the similarly artsy Marcus Mumford (inset), frontman for indie rock band Mumford & Sons.

Fans have been rooting for Reese Witherspoon to find her happiness ever since her split from Ryan Phillippe. And though she seemed to be a suitable match for Jake Gyllenhaal (inset), it was talent agent Jim Toth who finally took Reese to the altar this year.

It seemed that Leonardo DiCaprio had found a kindred soul in the form of supermodel Bar Refaeli -- or at least a similar level of physical attractiveness. But this pretty powercouple has since split and now DiCaprio is allegedly head-over-heels for that tall drink of water named Blake Lively.

Petite actress Hayden Panettiere apparently has a thing for the jocks. First she was dating Wladimir Klitschko, a Ukrainian boxer nicknamed Dr. Steelhammer. The two broke up, however, and now Panettiere is dating New York Jets wide receiver Scotty McKnight (inset). What a great way to stay in shape.


Jessica Simpson and Eric Johnson don't have too much longer to wait for their wedding day, but it's still hard to think about Simpson without mentally pairing her with her first hubby, Nick Lachey (inset). We like that Eric doesn't seem interested in sharing the spotlight with Jess, but, one has to wonder: Will the former NFL player seek gainful employment, or be a house husband?

If we're comparing Nick Lachey to Eric Johnson, then it's only fair to compare Nick's previous wife, Jessica Simpson (inset), to the one he just married, Vanessa Minnillo. They seem like fairly different women. In fact, you have to wonder what Jessica and Vanessa would have in common aside from Nick himself. And wouldn't that be an interesting conversation?

The latest addition to Kelsey Grammer's collection of wives is Kayte Walsh, a onetime stewardess who bears a passing resemblance to Kelsey's previous wife, Camille Grammer (inset) of "Real Housewives" fame. In fact, it's safe to say that Kelsey has a type. But time will tell if age is the only difference between Kayte and Camille.

OK, maybe Penelope Cruz's younger bro, singer Eduardo Cruz, is a rebound for Eva Longoria off her divorce from NBA player Tony Parker (inset). But even if that's the case, a girl could do a lot worse than goING globe-trotting with some 26-year-old eye candy, right?

Anyone with even a slight awareness of celeb gossip knows the circumstances of LeAnn Rimes's relationship with her current husband, Eddie Cibrian. Simply put, when Rimes and Cibrian met, they were already married to other people. But was it worth it for Rimes to trade in her first hubby, back-up dancer-turned-chef Dean Sheremet (inset), for someone else?

It seems like Cameron Diaz's efforts to keep her relationship with Alex Rodriguez (inset) out of the spotlight only intensifies her fans' interest in what the two up to. But is A-Rod a better match for Cameron than her multitalented ex-boyfriend Justin Timberlake?

Oh, Vienna. This "Bachelor" star is named for a city that probably few Americans have been to, and yet the same type of Americans probably feel way too familiar with her personal life. But tell us, Viennaphiles and Viennaphobes alike: Was she better off with pilot Jake Pavelka (inset), who she called the "biggest liar I have ever met"? Or did she do better by snagging her current live-in boyfriend,

"Bachelor Pad" co-star Kasey Kahl?

Source: wonderwall