Two days after J.R. Martinez took home the mirror ball trophy, the Dancing With the Stars champ and professional partner Karina Smirnoff are still celebrating!

The duo, proudly displaying their glitzy trophy, headed to New York for a special appearance on Good Morning America.

Martinez, an Iraq war veteran, discussed the suspenseful DWTS finale. He told the GMA audience:

"I said to Karina … 'Can they just tell us already?' It seemed like the moment was just lasting forever when they were building up the suspense. It's amazing. We've all been putting over three months of work into this. To be able to hold that [mirror ball trophy] up was a tremendous honor."

This is Karina's first win after being a part of DWTS for ten seasons. She definitely deserves it!

Rob Kardashian took second place and talk show host Ricki Lake finished in third.

Justin Bieber and Usher performed at the Christmas tree lighting ceremony at the Rockefeller Center in New York City yesterday, and it looks the 17-year-old pop star and his mentor had a blast belting it out. Funny, Usher's career has totally taken a backseat to Bieber's ... think he minds?

Busta Rhymes also joined the guys onstage, and afterwards Bieber tweeted, "that was a great day....HAPPY HOLIDAYS EVERYONE!!". We'll get to see their complete performance when the concert airs next Wednesday ... can't wait!

Katherine Heigl had her birthday dinner (one day early) at Mercato di Vetro with husband Josh Kelley last night, and the former Grey's Anatomy star looked amazing in a little black dress and sexy patterned tights.

We also got a peek at Josh's new tattoo, which he got earlier in the day with Kat by his side. So what is it? It's the Sagittarius sign, which pays homage to his wife and their adopted daughter, Naleigh, who both have birthdays in November. So sweet!

But who's going to stay with Demi Moore over the holiday?

Rumer and Tallulah Willis won't be with their mom this Thanksgiving -- we spotted the girls with dad Bruce Willis and stepmom Emma Heming at the Roissy Airport in Paris this morning, and Rumer tweeted, "Off to Paris I go!! Can't wait to see my beautiful lil sis at the Crillion ball." Hmm, maybe Scout stayed behind with Demi?

Kim Kardashian put on her casual clothes and kept her hair in a braid while working at the Los Angeles Mission ... serving hot meals to those in need.

The 31-year-old reality star Tweeted:

Just left the LA Mission. Met so many kind hearted people! They're goal is to feed 120,000 people by the end of the yr! We fed so many today. Everyone of us can do something small that will make a huge difference to someone else.

The LA Mission is celebrating its 75th anniversary this year. Also on hand ... actress Jennifer Love Hewitt who stood beside Kim on the serving line. Great to see these smiling starlets doing their part!

Click thru to see which Avatar star was also in the mood to give.

Move over, Justin Bieber! Lady Gaga is jumping on the holiday song bandwagon, and we love her take on the classic tune "White Christmas."

The eccentric singer has released A Very Gaga Holiday ... featuring four-tracks including "Edge of Glory" and "You And I."

Gaga has also teamed up with ABC for the TV special A Very Gaga Thanksgiving airing tomorrow night.

Click thru to see the incredible preview of the Gaga-licious festivities.

Here's Maroon 5's sexy frontman Adam Levine's sculpted body in all its tatted-up glory ... and yoga has been the secret to his physical success!

The Voice mentor clearly has muscles, but weightlifting isn't for him. Levine, 32, tells Details:

"Weights made my neck thick, and I would be like, 'I'm turning into a monster! Yoga takes what you have and molds and sculpts it, which is a much more natural way to look and feel."

Levine says that before shows, he practices an hour of yoga ... and as a result, "I come out physically relaxed."

For those who say Yoga is all about the mind, the "Moves Like Jagger" singer begs to differ. He says, "I don't like how people bullsh-t about how yoga is not about vanity."

Perhaps he'll take his colleague Christina Aguilera to a yoga class one of these days! It may not be "What A Girl Wants" ... but rather, what a girl needs.

Britney Spears turns the big 3-0 in less than two weeks, and she's revealing to UK's Stylist magazine that Gwen Stefani is her "dream musical collaboration." We can just imagine how hot that would sound!

The 29-year-old mama of two, who is currently on her Femme Fatale UK tour, has also just launched her latest perfume, Cosmic Radiance.

Brit has been criticized over the years about her fluctuating weight, and she admits to the mag that her biggest daily challenge is “trying to get up and go work out in the morning. I haven’t worked out in, like, two weeks. Sometimes it’s hard to be motivated. But once you get up and do it you feel like you’ve conquered the world.”

The "Criminal" singer, who has been dating agent Jason Trawick since 2009, also talks about her love of chocolate and comments on former Mickey Mouse Club buddy Ryan Gosling's career.

"Oh, I’m a huge fan; I think he’s amazing. I think he’s a wonderful little actor. He definitely has that ‘something’ on film; on camera, which is really cool. So I’m very happy for him.

Her bucket list wish? Brit says "to go skydiving." You go, girl!