Jessica Simpson fit in a workout today with a personal trainer in LA. The new mom is wasting no time getting back into an exercise routine and flashed a big smile from her car after the one-on-one session. Jessica gave birth to baby Maxwell Drew Johnson just one month ago. Maxwell made her public debut with a sweet cover shoot in People on May 30, and later that week, Jessica announced she would be joining the long list of celebrities who have endorsed Weight Watchers as the brand's latest spokesperson.

Beyond her new roles as a mother and as the face of Weight Watchers, Jessica is also keeping busy with her style empire. Jessica is designing a line of maternity clothes that she says will feature plenty of denim, leggings, flowing maxis, and vintage-print tops. The collection is due in stores this Fall.

Leonardo DiCaprio and his model girlfriend, Erin Heatherton, were together for a bike ride yesterday in NYC. The couple broke from their own film projects for the afternoon hangout. Leo's been working on Django Unchained with director Quentin Tarantino — the Django Unchained trailer is expected out today! Meanwhile, Erin lined up her own first movie role. Erin Heatherton filmed a part for Grown Ups 2, Adam Sandler's latest. In the comedy, she plays a hot girl working at, of course, a car wash. It's a departure from her usual work, which is strutting her stuff as a Victoria's Secret Angel. Leo and Erin seem to be going strong well into their seventh month of dating. We had a first look at the couple just as their romance was getting off the ground back in December of last year.

Carrie Underwood went short and sexy in a sequined number by Randi Rahm for the CMT Music Awards in Nashville tonight. She had husband Mike Fisher by her side for the event, where she was nominated for multiple awards. Carrie took home the honor for video of the year for "Good Girl" and was also up for female video of the year, which she lost to Miranda Lambert. Carrie and Mike had more to celebrate than just her big win this evening, as yesterday was Mike's 32nd birthday. The 2012 CMT Music Awards were hosted by Kristen Bell and Toby Keith.

Kristen Bell and her fiancé, Dax Shepard, posed together on the colorful carpet at the CMT Music Awards in Nashville tonight. Kristen started the evening in a gold Reem Acra gown before taking the stage to host the show with country artist Toby Keith. She had the support of Dax, who tweeted the sweet message, "Check out the cutest host in the history of the CMT Awards." There were other stars on hand for one of country music's big events, including Carrie Underwood, Ashley Greene, and Miranda Lambert.

Emma Stone and Andrew Garfield held hands as they made their way through LAX today. The couple were together on the West Coast, where they attended the MTV Movie Awards on Sunday. Emma and Andrew took the stage to present the breakthrough performance honor to Shailene Woodley and also promote their upcoming blockbuster, The Amazing Spider-Man. Emma chatted up the movie with an appearance on The Tonight Show and joked about Andrew's skills as the latest man to step into the Spidey suit. We'll be able to judge for ourselves when the action hits the big screen on July 3, but first the stars will return to LA for the big premiere on June 28.

Kate Bosworth stood on her tiptoes yesterday to plant a kiss on her boyfriend Michael Polish's lips. The couple were out for a walk together in NYC's West Village. Kate and Michael arrived in the Big Apple a few days ago, in time for Monday's CFDA Awards. Kate Bosworth wore Altuzarra to the CFDAs and was on hand to congratulate Joseph Altuzarra in person after he won the Swarovski award for womenswear. Michael and Kate will have another big evening out on the town tonight. They're expected to attend the annual Whitney Art Party at the Whitney Museum, and will mingle with other celebrity guests, including Julianne Moore, James Franco, and many more.

Liam Hemsworth had a lot to smile about on set in New Orleans today — he got engaged to Miley Cyrus last week! Liam proposed with a 3.5-carat ring, having dated Miley since 2009. Miley and Liam have had many cute moments in their three years together, including red carpet appearances and couple's getaways. Now that the news is public, Miley took to Twitter to write, "Thank you for all the love today. I'm happy to share this news with you all. I feel like all my dreams are coming true. Have a great day." It looks like Liam will be juggling wedding planning with work in the coming months since he's currently filming Empire State and will get back to his Hunger Games role at the end of the Summer.