Spotted: Lauren Conrad feeding the parking meter before heading to the Kate Somerville Spa.
In a funny post on her blog, the 25-year-old challenges her fans to join her on a week-long plan of tweaking their diets and exercise routines to fit back into their skinny jeans post-holiday.
"Sadly there's no way to un-eat what you've already eaten over the holidays. But thankfully there is a solution: If you make a conscious effort to have healthier eating and exercise habits, your body will bounce back in no time!" Conrad writes.
She also provides meal recommendations and exercise ideas to get your sweat on, and invites her readers to submit their results pics when they wrap things up for a chance to be featured on her blog as her "Chic of the Week."
Interested in joining Conrad and her fans on a "7 Days to Skinny Jeans" challenge? Head to her blog to get started!

Lauren Conrad was spotted at the Kate Somerville Spa in West Hollywood yesterday, November 18.
LC looked cute & casual in a neutral top with bright bottoms.
What's Lauren been up to lately? Preparing for Turkey day!
She tweeted last night, "Planning my Thanksgiving day menu. My oh my, so many different ways to cook potatoes... Don't act like u aren't envious of my Friday night."
Lauren also blogged about giving back this holiday season:
"Join me in donating a gently-worn coat to help those locally in need at your nearby Burlington Coat Factory. Not only will it warm your heart by giving, it will warm the soul of those giving thanks.
Let’s work together to make sure everyone has a warm and happy holiday.
XO Lauren
P.S. For more information about the Warm Coats & Warm Hearts Drive, click here."

Spotted: Lauren Conrad leaving the Kate Somerville Spa in West Hollywood

Stepping out for a midday pampering session, Lauren Conrad was spotted making her way around Los Angeles, California on Monday (August 23).
Lauren donned a casual pink zip-up top with black knee-high pants as she received a relaxing treatment at the Kate Somerville spa.

Lauren tweeted:
"Gym clothes, no makeup, wet hair and leaving a painful laser hair removal apt... This is exactly when I want to find 15 paps around my car"