The premiere of the all-star season of Dancing With the Stars is still three weeks away but rehearsals began Saturday to give the alumni plenty of time to brush up on their moves.

Kirstie Alley Tweeted yesterday of practice with her partner Maksim Chmerkovskiy: "I feel like my first day of school…ugh…butterflies and nausea.” And: “Dancing is an emotional thing…today my emotion was happy and freaked out my mind…there’s always tomorrow!!! Rise to the challenge!!!"

And though Maks is often criticized for being too tough on his dance partners, he was gracious in Tweeting back at Kirstie yesterday: "So happy I got my friend back for DWTS All Stars. Kirstie Alley was AMAZING today! Let the games begin!!!"

This popular pair will square off against these other couples from seasons past:

- Pamela Anderson and Tristan MacManus
- Sabrina Bryan and Louis Van Amstel
- Helio Catroneves and Chelsie Hightower
- Joey Fatone and Kym Johnson
- Shawn Johnson and Derek Hough
- Drew Lachey and Anna Trebunskaya
- Giles Marini and Peta Murgatroyd
- Kelly Monaco and Val Chmerkovskiy
- Apolo Ohno and Karina Smirnoff
- Bristol Palin and Mark Ballas
- Melissa Rycroft and Tony Dovolani
- Emmitt Smith and Cheryl Burke

Who will YOU be rooting for?

It's always good to have grandma around!

Kris Jenner held on tight to her grandson Mason during a morning shopping trip in Malibu with her daughter Kourtney and baby granddaughter Penelope (in the stroller).

Kourt hit the Country Mart with her mom ... and a corp of paparazzi, of course!

Photographers swarmed the mother-daughter duo as they made their way from Kitson Kids to Toy Crazy, making purchases only for little Mason and baby Pene!

The two-year-old his baby sister, now almost two months old, live the high-life just like the rest of his reality-show family. Who knows, maybe one day they'll be hopping in private helicopters just like their Aunt Kim!

No doubt, Gwen's style rocks! The rock star mom rocked some baggie, green plaid pants with black, cage sandal heels, a white tank and a natural woven fedora on top.

The singer has been hard at work promoting her album Push and Shove. And she's paying attention to fan love for the new single -- Stefani Tweeted, "R u kidding me? This is so rad! Love u guys whoever u r gx RT @cynelectric: The first Push & Shove cover! @NoDoubt."

Check out the fan cover ...

Despite reports a heavily-pregnant Reese Witherspoon was ordered to bed rest by her doctor, the actress was out and about in Malibu Saturday with her son Deacon and hubby Jim Toth.

Reese is staying in the LA beach town for the long holiday weekend, getting some R&R with her family. Hey, it's LABOR Day tomorrow -- could labor be coming for Reese?

Kim Kardashian and Kanye West hit the movie theater in New York City Saturday in full Kimye style -- Kanye with his leather jeans and huge gold chain and Kim in an off-white peplum top, leather skirt and sexy heels.

Oh, this wasn't your average move date night; these two rode in style to the theater, in a $500,000 Maybach and afterward, they hopped a helicopter to head out of the city. That's what I'd call a million-dollar date!

Gwen Stefani was lookin' HOT Friday as she arrived at a Culver City radio station for an interview wearing a hip denim vest, paired with shocking yellow Louboutins. Only Gwen could work such a casual piece with $1000 heels and make it work!

Gwen's busy promoting No Doubt's new album Push and Shove and preparing for performances at the MTV Video Music Awards next week and the iHeartRadio Music Festival in Las Vegas.

The group's first album in over a decade is due to hit stores Sept. 25.

Rupert Sanders' estranged wife Liberty Ross knows how to work it!

The scorned woman in her hubby's cheating scandal with Kristen Stewart hit Beverly Hills in super short shorts, high heels and a smile on her face, knowing that looking HOT in front of the cameras is the best revenge!

Britney Spears' former manager, Sam Lutfi, is calling the pop star to testify in the upcoming hearing for his 2009 defamation lawsuit against Brit and her parents.

Papers filed by Lutfi ask that the judge require Britney's conservators to make her available to testify in court with her role as a judge on the upcoming season of X Factor as proof that she's capable to do so.

In 2009, Lutfi claimed breach of contract and defamation against Spears and her parents Jamie and Lynne and the case is set to be tried in court this month. He claims Britney breached a contract that would give Lutfi a portion of the star's fortune AND that her parents made defamatory statements, alleging Lutfi drugged Britney and cut off her phone service to isolate her from her family.

Spears' conservators have claimed she's not mentally competent to testify, but her $15 million contract to appear on Simon Cowell's talent show doesn't help their argument. Lutfi even submitted a DVD of the X Factor teasers as evidence the star is fit to speak on her own behalf.

A hearing is scheduled for September 25 and a judge has yet to rule on the request.