Sophia Bush

One Tree Hill is gearing up for its long-awaited series finale and not a moment too soon for star Sophia Bush, who just split with co-star Austin Nichols.

He's the third guy she's dated from the just-wrapped TV hit.

Bush broke it off with Nichols (who plays her husband) "because she didn't think he was the one," explains a close source. "She's moving on."

The actress married Chad Michael Murray in 2005 and dated James Lafferty in 2009. The final episode of One Tree Hill airs April 4 on The CW.

[Photo: WENN.com]

For a pair of actresses, Saturday's tragic shooting in Tuscon was extra personal.

Both Gwyneth Paltrow and Sophia Bush had connections to victims of the incident, as the Country Strong actress is actually cousins with Congresswoman Gabrielle Giffords, although the two have never met.

“Although I have never had the pleasure of meeting congresswoman Giffords, my thoughts and prayers are with her and her family as well as the other victims of this horrible act of senseless violence," Paltrow told Entertainment Tonight.

Tweeted the One Tree Hill star, who the second cousin of Christina Green, a nine-year-old girl killed during the attack that was born on 9/11/01 and who was the granddaughter of former baseball manager Dallas Green:

“There are no words to explain what my cousin’s family is going through in Arizona. How can this be? Violence is never the answer."

Jared Loughner has been charged in the shooting, while President Obama has called for a national moment of silence today at 11 a.m. EST in honor of the victims.

Earlier this week, Damon Thomas called out ex-wife Kim Kardashian as a "fame whore" who is jealous of her sisters and has no talent.

Soon afterward, Khloe Kardashian came to Kim's defense and said: "We haven't spoken to this guy in years! Their relationship was 10 years ago! It's sad that people will make up lies for money! I'm just happy that Kim is out of that unhealthy relationship."

That's a nice sentiment, but Khloe has her own problems to worry about: she's been challenged to a fashion face-off by Sophia Bush!

The One Tree Hill actress is seen below in the same Hervé Léger dress as Khloe donned last month. Study the photos and then vote in our poll...

Who looks better in this dress?

For more on this look and other celebrity style choices, remember to hit up the THG fashion store!

Summer just started three days ago, but the OP clothing line is turning its eye towards going back to school - with celebrity fashion icons promoting the cause.

Some of Hollywood’s hottest young stars are posing for the brand's “OPen Campus” campaign, including 90210 star AnnaLynne McCord, One Tree Hill's Sophia Bush, Solange Knowles, Joel Madden, The Hills' Brody Jenner and Cody Linley.

The sexy sextet posed on a custom OP bus by West Coast Customs that has everything from a stage on the roof to recycled cork floors and a gaming system.

Here's Brody Jenner, AnnaLynne McCord and the rest of the gang's back-to-school ad, along with their previous ad for OP's "Summer of Love" campaign ...

TOO COOL FOR SCHOOL: Six young Hollywood stars promote OP's fall line.

At the shoot at University High School in L.A., the girls bonded over gossip in the bus while Cody and Brody palled around on skateboards between takes.

Appearing in the ads was not a hard sell for the stars.

"When they asked if I wanted to be involved, I was like, 'definitely!'" said Joel Madden. "Op is a classic California skating and surfing brand. It’s very cool."

"Being from Southern California, I basically grew up wearing Op," Brody Jenner added. "It’s really cool for me to now be part of their new ads."

As embattled Miss California Carrie Prejean can attest, there is controversy being caused by advocates of gay marriage and it is sweeping this nation.

Perhaps she's even seen the new "Gathering Storm" video from The National Organization for Marriage, which has been viewed 500,000+ times online.

The nonprofit organization's mission is "to protect marriage and the faith communities that sustain it." The video, posted April 7, warns of a rapidly developing deluge of same sex unions that real Americans must band together and withstand!

In response, One Tree Hill's Sophia Bush, Scrubs and How I Met Your Mother star Sarah Chalke, Alicia Silverstone, Lance Bass and other celebs got together to shoot "The Gaythering Storm," a Funny or Die parody of the NOM video.

Follow the jump for the original video and the parody - these are two eye-openers for people on either side of the gay marriage debate:

Sophia Bush, Brody Jenner, AnnaLynne McCord, Solange Knowles, Joel Madden and Cody Linley appear in ads for clothing company Op's "Summer of Music" campaign.

The campaign - which will debut this month - was shot on Westward Beach in Malibu. The stars rocked out to a live Good Charlotte show as they posed for the pics.

"When they asked if I wanted to be involved, I was like, 'definitely!'" said Joel Madden, whose brother Benji also made an appearance in one of the ads.

"Op is a classic California skating and surfing brand. It’s very cool for us. It’s a natural, easy collaboration for Good Charlotte. We don’t get to play a lot of shows on the beach so it’s cool to be here today playing on the beach for Op."

A regular on The Hills and an actress who produces classic One Tree Hill quotes like it's her job were also excited to be part of this new campaign.

"Being from Southern California, I basically grew up wearing Op," Brody Jenner said. "It’s really cool for me to now be part of their new ads."

When the brand relaunched in 2008, Rumer Willis, Jenner's ex-girlfriend Kristin Cavallari, Pete Wentz and Wilmer Valderrama modeled the clothes.

The spring and summer collection of Op is available exclusively at Wal-Mart.

Here's a picture of a beautiful Bush. No, not Reggie. And, no, certainly not Britney Spears' crotch.

We're talking about actress Sophia Bush, who looked lovely at the 10th Annual Gen Art Styles International Design Competition last night.

She doesn't seem to care that ex-boy toy Tony Romo is still getting it on with Jessica Simpson, does she? Good for you, Sophia!

It's like Old Navy tried to round up stars from all of The Hollywood Gossip's favorite TV shows and get them into the same party. Well, minus The Hills.

Hey, bobody's perfect. The casts of Heroes, Gossip Girl and One Tree Hill were all well represented Wednesday during a party for Old Navy's new line at Eyebeam Atelier in New York City. Check out these cute photos ... 

Chace Crawford and a bunch of cuties from various hit shows. Nice. 

On the left, Carrie Underwood boy-toy Chace Crawford (of Gossip Girl) and Heroes hottie Hayden Panettiere cuddle up. Platonically, of course.

On the right, Heroes' Kristen Bell leans on One Tree Hill star Sophia Bush (who, like Underwood, dated Tony Romo), while Gossip Girl's Blake Lively and Ugly Betty's Becki Newton talk it up and share some fashion advice.

Sadly, Tony Romo appears to have had enough of Sophia Bush.

Celebrity gossip fans, however, yearn for more of the One Tree Hill star.

At least they should. Sophia Bush is a real cutie - and proved it twice over the New Year's holiday by dazzling in both a little black dress and a little white dress on successive nights! See Sophia Bush in both below ...

Forget about Britney Spears, Alli Sims and Carrie Underwood. It looks like football star Tony Romo is really going out with One Tree Hill star Sophia Bush.

Nearly four months after splitting with Carrie Underwood, the Dallas Cowboys star quarterback was spotted dining with Sophia Bush on October 22.

And get this - he introduced her to his parents the very next night! Looks like he's got ahold of her heart... let's just hope he doesn't fumble inexplicably.

"She can't believe it's happening so fast!" says a friend of Sophia Bush, adding that the One Tree Hill actress already has plans to fly out east to attend ­Tony Romo's game against the New York Giants on November 11. How cute!

  You heard it first here, gossip fans: the Dallas Cowboys will lose that game. Romo's mind clearly isn't on any football game ... just his game with Sophia Bush.

But will this blissful union last? Romo was seen hanging out with - gulp - none other than Britney Spears at Les Deux on October 26, when they were introduced by Spears' pal Alli Sims - another Romo ex-girlfriend, says an Us Weekly source.

On his KIIS-FM radio show two days later, onlooker Ryan Seacrest said he saw Spears give Tony Romo a lap dance that night at Les Deux.

But a Romo source insists, "Tony was disgusted with Britney Spears. It was purely Britney wanting to do it. All he can talk about is Sophia these days."

If so, Tony Romo and Kevin Federline now have two things in common: getting lap dances from Britney Spears and working (it) with Sophia Bush.