Dancing with the Stars

Derek Hough was just trying to party with his fellow "Dancing with the Stars" castmates ... when he got slammed into from behind ... by some dude in a Porsche.

Hough was waiting to valet his car at STK last night ... when another driver banged into the back of D's Audi.

After the accident, the two exchanged information in front of the paparazzi ... and the giddy other driver couldn't have been happier ... sporting a big ol' smile on his face as the snappers took shot after shot.

Mark Ballas may be a dancing machine by night -- but he's also a sweaty, half-naked ass-kicking machine by day ... and TMZ has the video to prove it.

We caught the "Dancing with the Stars" pro kicking, punching, and kneeing the crap out of his trainer at True Warrior Fitness in L.A. yesterday -- and we gotta say ... it's pretty impressive.

After the session, Mark said his trainer told him, "If you can dance, you can fight."

Lacey Schwimmer is proving those Jessica Simpson mom jeans comparisons are a huge stretch -- striking a yoga pose yesterday in West Hollywood that shows the only thing big about her ... is her flexibility.

Nancy Grace has a new excuse for the mystery fart on "Dancing With the Stars" this week ... she's pinning it on her partner, Tristan MacManus.

As the old saying goes ... the one who denied it, supplied it.

A fart fetish group has made an offer to ABC to license the rights to the infamous Nancy Grace "Dancing with the Stars" fart footage ... we repeat, a fart fetish group ... apparently, they exist.
A rep for the fetish site Clips4Sale.com tells TMZ, the company made an official offer to ABC yesterday -- writing, "After viewing and hearing Nancy Grace's alleged 'toot' after her performance on 'Dancing With The Stars,' [we] would like to acquire the rights of the three-second footage." (below)

The rep adds, "We wish to acquire this for our members of our web site who are 'Flatulophiliacs' or simply put, 'Fart Fanatics'."

It's unclear how much the clip would cost -- or if it's even for sale -- but we're confident these guys can sniff out a good deal.

She got a fair trial in the TMZ newsroom ... but Nancy Grace was officially convicted on one count of chemical warfare ... by farting in the ballroom on "Dancing with the Stars."

BREAKING WIND NEWS -- Nancy Grace claims she's been FRAMED in the "Dancing with the Stars" fart mystery ... and tells TMZ an "investigation" is underway to find out who REALLY dealt it.

Grace -- who was doing a post-dance interview on the show last night when someone let it rip -- tells us, "As an ear witness on the scene, I can absolutely exonerate Tristan, myself and Brooke."

Nancy Grace definitely cut a rug on "Dancing with the Stars" last night ... but did she also cut the cheese???

Listen closely to the clip of Nancy yakking with Brooke Burke after she waltzed to "Moon River." You'll hear what sounds like a fart escaping from someone. As far as we can tell, there are only three possible culprits.

So we ask ...

Less than three months after breaking off their engagement at the VERY last minute, Kristin Cavallari and Jay Cutler were seen holding hands in L.A. today.

Pretty shocking they would reconnect ... especially because Kristin had already taken pictures IN HER WEDDING GOWN when the two suddenly called it quits.

But the Chicago Bears quarterback was spotted in the audience at "Dancing with the Stars" last night ... and now, some P.D.A. in front of the photogs.

Not a good month for Mark Ballas -- two weeks after the "Dancing with the Stars" pro lost his hot girlfriend Pia Toscano ... some heartless burglar busted his car window and jacked his guitar.

Ballas posted the bad-luck news this weekend on his Twitter -- writing, "My car just got broke into and my first Martin guitar was taken..."

To make matters worse, Ballas says his super-expensive Breitling watch was stolen earlier last week.

On his way out of "DWTS" practice, Ballas told photogs he'll pay good money to get Marty back.

Getting booted of "Dancing With the Stars" in week one is working out just fine for Ron Artest's partner -- because Peta Murgatroyd just signed a SIX FIGURE deal to fight cellulite.

Sources close to Murgatroyd tell TMZ she's working with Adonia Organics to endorse their cellulite serum -- which claims to reduce the dreaded "c word" in just nine minutes. And, yes ... we're told Peta's killer legs will be on full display for the campaign.

Finally, an upside to cellulite.

Rob Kardashian is like one of Pavlov's dogs ... a little praise from "Dancing with the Stars" judge Carrie Ann Inaba has him thinking he's got a shot to win the whole competition.

After Rob danced the jive on Monday ... Carrie Ann said, "It's official. Rob Kardashian is a better dancer than Kim Kardashian!"

Now sources close to the show tell us Rob is hitting the gym daily, practicing harder than ever -- and sucking up to his partner/teacher Cheryl Burke by bringing her lunch each day.

Rob's new attitude is a 180 from a few weeks ago -- when he was a total slacker.

The suspicious letter containing white powder that triggered a crisis at CBS Studios today was addressed to a specific individual connected with "Dancing with the Stars" ... TMZ has learned.

While there's been controversy surrounding Chaz Bono's appearance on the show ... sources tell us the target was NOT an on-air personality or contestant.

As we previously reported, it was determined the powder in the letter was not a harmful substance.

The suspicious, white-powder-containing letter that triggered an emergency situation at CBS Studios in Hollywood today was intended for "Dancing with the Stars" ... law enforcement tells TMZ.

TMZ broke the story ... emergency vehicles were called to the studio after an unknown white powder spilled out of a letter inside the CBS mailroom.

Officials later determined the substance was not anthrax -- or any other harmful substance.

Police and emergency vehicles arrived to CBS Television City in Hollywood moments ago ... after someone reported that white powder spilled out of a letter in the CBS mailroom.

Law enforcement sources confirm ... cops are investigating the scene.

Sources on the lot tell TMZ ... the letter was NOT addressed to anyone on "Dancing with the Stars" ... but so far, it's unclear who the intended recipient was.

It's not the first time CBS has had an anthrax scare -- just last year, the studio went on lockdown when production staff found white powder in a letter addressed to Bristol Palin.

Officials also intercepted a threatening letter addressed to "Late Late Show" host Craig Ferguson just last month. The letter also contained white powder -- which was later determined to be cornmeal.

3:21 PM:The L.A. City Hazardous Materials team is on the scene.