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The Jonas Brothers just scored.

The singing siblings are set to provide the live halftime entertainment for the Dallas Cowboys matchup against the Seattle Seahawks on Thanksgiving Day, Nov. 27. The game, a tradition as much as the post-turkey nap, could probably use a boost of Jo de vivre, especially considering the Seahawks are currently 1-4 this season.

But more than just candying your yams, the brothers aim to do good as well: They'll kick off the Salvation Army's Red Kettle Christmas Campaign, which raises money (last year $118 million!) to feed, clothe and provide toys to nearly 29 million Americans.

In years past, the talent has included Kelly Clarkson, Carrie Underwood, Sheryl Crow, Destiny's Child, Toby Keith, LeAnn Rimes, Creed, Jessica Simpson, Billy Gillman, Clint Black, Randy Travis and Reba McEntire.

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Ryan Reynolds has already raced to the altar with Scarlett Johansson. The New York City marathon should be nothing.

The Smokin' Aces stud announced today that he's gearing up for his latest conquest, running the Big Apple route on Nov. 2.

But he's a little concerned about the "bleeding nipples."

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For Halloween, Selena Gomez is unmasking her charitable side.

The Disney Channel wizard has signed on as the face of the 2008 Trick-or-Treat for UNICEF campaign, which urges kiddies to help out children around the world by collecting donations while making their yearly candy runs on Oct. 31.

The program has raised more than $140 million since its inception in 1950.

"I am extremely excited to be this year's Trick-or-Treat for UNICEF spokesperson," the 16-year-old Gomez said. "I want to help encourage other kids to make a difference in the world."

The Wizards of Waverly Place star hasn't let on to what she'll be doing for Halloween this year, but we imagine that dressing up as a lovebug will be involved.

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Quicker than you can say jambalaya, Brad Pitt, Angelina Jolie and their crew dashed in—and out—of the Big Easy. 

After popping into New Orleans a couple of days ago, the family has already touched down again in France, apparently catching a red-eye flight Tuesday evening. But while speedy, friends of the dynamic duo say the couple had a very specific purpose for their N'Awlins visit. 

"First, Brad wanted to check on the progress of the houses being built in the Ninth Ward," says a New Orleans activist, referring to the low-income neighborhood devastated by Katrina and being rebuilt with the help of Brad's charity, Make It Right. About 90 houses are under construction, but Brad hopes to increase the number to 150 total.

But that's not all…

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Jemal Countess/Getty Images; Frank Micelotta/Getty Images for MTV

Time to cue the Rocky theme and start chasing chickens: Michael Lohan wants Perez Hilton to be his human punching bag.

Lindsay's dad was initially slated to duke it out with Kevin Federline for a New York children's charity, but since that fell through, he's targeting a new sparring partner.

“Out of all the people on this planet, if there is one person I would really love to get in the ring with me," he says, "it would be Perez Hilton."

And the gossip blogger isn't backing down. "The only thing [Lohan]'s good at is throwing jabs in the media toward Dina Lohan and Samantha Ronson," Hilton tells E! News.

"I don't think Michael Lohan can handle the whooping I'd throw his way. I would obliterate him with my right hook in the ring!"

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On the heels of two viral pro-Barack Obama singles, political activist and celeb wrangler extraordinaire will.i.am has released yet another star-studded music video into the online ether, this time in an attempt to eradicate global poverty.

The Black Eyed Pea frontman today launched the In My Name campaign to support the Global Call to Action Against Poverty. The announcement took place in front of the United Nations, with the rapper joined by Krisin Davis, Elle Macpherson and Jordan's Queen Rania Al Abdullah. All appear in the new video along with Scarlett Johansson, Fergie, Wyclef Jean, Annie Lennox and John Legend, among others.

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Mariah Carey is making a run for the border...for a good cause.

The Grammy winner has signed on as the latest Hunger Ambassador for the Yum! Foundation's World Hunger Relief, an annual effort that aims to raise money for the United Nations World Food Program and bring an end to starvation around the world.

Her duties include becoming the actual poster child for the cause, appearing on print ads that will be featured in more than 100 countries and 36,000 franchises.

"The change from hunger to hope starts with you," Carey's poster reads.

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FAME PICTURES

Jennifer Lopez may not have clocked the fastest time, but she and the other competitors at Sunday's 22nd Nautica Malibu Triathlon helped raise nearly $1 million for the Pediatric Cancer Research Program at Children's Hospital in Los Angeles.

As reported earlier today, J.Lo turned in a seriously impressive 2 hours, 23 minutes and 38 seconds and raised $125,000 on her own for the event, which was presented by Toyota.

The winner overall was Chris McCormack, while The Bachelor's Andy Baldwin won the celebrity bragging rights, if not a rose, with his time. Other stars who competed were Felicity Huffman, William H. Macy, Jon Hamm, Mark-Paul Gosselaar, Jon Cryer, Monique Coleman, Scott Foley and Anna Kournikova.

Since they did so much good, we thought we'd offer you a treat for the eyes with our Sweatin' With the Stars gallery.

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Wedding Planner costars Jennifer Lopez and Matthew McConaughey reunited on the shores of Malibu on Sunday morning.

The two were among the hundreds of participants at the annual Nautica Malibu Triathlon, which benefits Children's Hospital of Los Angeles' Pediatric Cancer Research Program.

The 39-year-old singer-actress finished the half-mile ocean swim, 18-mile bike ride and four-mile run in 2 hours, 23 minutes and 28 seconds.

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THONY BELIZAIRE/AFP/Getty Images

Matt Damon and Wyclef Jean spent the weekend touring the Caribbean—but it wasn't a vacation.

The pair joined forces to bring attention to the desperate situation in Haiti, which has been hit by four tropical storms and hurricanes since mid-August, including Hurricane Ike last week. Hundreds of thousands of residents have been left hungry and homeless, and more than 300 people have died.

"It's inhumane," said Jean, who was born in Haiti. "I wish there was a word in the dictionary. No human should be living like this."

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Angelina Jolie and Brad Pitt may have newborn twins and four other children to care for, but that doesn't stop them from looking after hundreds of thousands of children in Ethiopia, too.

The Jolie-Pitt Foundation made a $2 million donation to the Global Health Committee on Saturday to create a center for AIDS- and tuberculosis-affected children in Ethiopia. The center will be named after the couple's daughter Zahara, 3, who was adopted from the African nation in 2005.

"It is our hope when Zahara is older, she will take responsibility of the clinic and continue its mission," Pitt said in a statement announcing the donation.

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Wyclef Jean is trying to keep his homeland above water.

The Haitian singer, who serves as a Goodwill Ambassador to the notoriously poor Caribbean nation, and his Yelé Haiti foundation have launched the Haiti Storm Relief Fund in response to the devastation wrought by Hurricanes Gustav, Ike and a series of storms that have also battered the southeastern U.S, the Bahamas and Cuba.

Jean's group has been doling out food, water, purification tablets, tents, blankets, medical supplies, hygiene kits and cash to various nonprofit relief organizations currently toiling away in Haiti, where hundreds of people have died over the past several weeks.

Teaming with the Pan American Development Foundation and the World Food Program, Yelé Haiti is planning for a massive emergency food delivery to begin within the next few days.

"My country is facing a serious catastrophe at the moment, and we urgently require assistance," Jean said. "But the long-term catastrophe is that we have less than 2 percent tree cover, and without restoring our forests, we will always be susceptible to mudslides and flash floods from storms and hurricanes."