So this is her secret to getting her pre-pregnancy body back!

Hilary Duff shows off her impressive bending skills in a new Twitter pic, and the blonde beauty sure seems to be taking her Pilates classes seriously!

"Nice stretch... Mmm," she captioned the snapshot, in which she works on her flexibility with her instructor.

The Duffster, who gave birth to son Luca last March, has approached post-pregnancy weight loss the healthy way, and all her hard work is now paying off! The 25-year-old recently tweeted that she's back in her size 26 skinny jeans!

Lookin' leggy Hil!

Jennifer Aniston knows how to make an entrance!

The former Friends actress arrived on the set of Jimmy Kimmel Live armed with a mallet and wearing goggles.

Jimmy's pal was there to destroy his old set and to usher in his new time slot.

We loved seeing that her beau Justin Theroux came along for support!

Click thru to watch Ms. Aniston give Kimmel a haircut. Love her!

Only the best for Real Housewives of Beverly Hills star Lisa Vanderpump!

The uber-wealthy restauranteur cruised through LAX holding on to her cute little dog ... and both of them were wrapped in her long fur coat. Love the black Louboutin boots!

Lisa must be on cloud nine after hearing that the debut of her Bravo reality show Vanderpump Rules was a hit with audiences. No wonder she's smiling.

Good to know that the stunning RHOBH reality star travels in style. Then again, we wouldn't expect anything else.

But wearing that coat, watch out for PETA, Lisa!

Jessica Alba has always been super fit, but when we snapped her at the gym on Tuesday afternoon in West Hollywood, we couldn't help but notice how skinny her legs looked in these cropped spandex!

The actress/Honest Company founder and her family are back from their holiday vacay in Cabo, and when she wasn't flaunting her amazing bikini bod, she was snuggling up to hubby Cash Warren. Guess those rumors that the two are on the rocks are total BS!

Jess recently opened up to InStyle about her marriage, telling the mag, “He instantly felt like family. It was so easy. I’d never felt like that with anyone ... I was usually pretty self-conscious, minding my p’s and q’s, very aware of every time my fork hit the plate when I was having dinner on a date. With him, there was none of that. We got each other. We’re kindred spirits.” Awww!

Jennifer Aniston is ecstatic about something!

The 43-year-old actress made an appearance on Jimmy Kimmel Live on Tuesday, and she was accompanied by fiance Justin Theroux, who ditched his usual all black attire for a bright white shirt!

These two are always a sight for sore eyes.

She may not like to have her photo taken as much as someone like, say, Kim Kardashian, but Vanessa Hudgens was definitely out to get attention in these pants! Either that or she was trying to make us dizzy...

The 24-year-old starlet was spotted leaving her Pilates class in the valley on Tuesday, and if one of her New Year's resolutions was to hit the gym every single day in 2013, so far she's doing a pretty good job! Of course, she's also going to be making quite a few appearances on the red carpet this year, as she's promoting Spring Breakers, Machete Kills, Gimme Shelter and The Frozen Ground, where she plays a stripper. Gotta step it up!

On Tuesday Halle Berry picked up Nahla from school, and the notoriously poker faced actress couldn't help but crack a smile over her 4-year-old daughter's adorable antics!

Halle may have lost her latest custody battle with baby daddy Gabriel Aubry, but after a trip to France with beau (and sucker puncher extraordinaire) Olivier Martinez, it looks like she's ready to start the new year off on a positive note.

Seriously, what a cutie:

But shouldn't it be the other way around? Either way, she looks amazing!

On Tuesday afternoon Eva Longoria went to a meeting at MALDEF (The Mexican American Legal Defense and Educational Fund) in downtown Los Angeles, and after that she sped on over to Beverly Hills to get her hair done by BFF Ken Paves.

So what else is the former Desperate Housewives starlet up to these days? She tweeted today, "I'm hosting a star-studded show at @kencen the night before inauguration honoring Latino arts & culture!"

Longoria will be joined by George Lopez, Mario Lopez and Rita Moreno on Sunday January 20 for the 2013 Latino inaugural celebration, and she said in a statement, "Latinos played a critical role in this year’s elections and helped tip the scales in President Obama’s victory. But we are not waiting another four years to make an impact on our country’s future,” she said. “What better way to establish our presence at these inaugural celebrations than by showcasing the beauty and diversity of our culture at the nation’s premier performing arts center."