Jessica Simpson and Eric Johnson were together to run errands in LA yesterday. She was decked out in what looked like her workout gear, as well as one of her favorite items, Eric's Yale sweatshirt. They were able to spend time together during a break from Jess's hectic work schedule. She's been balancing work on the new season of Fashion Star with her responsibilities running the Jessica Simpson Collection. Earlier this week, Jess logged time on a shoot for her megabrand. She tweeted a photo from the beach location Thursday, "Just finished shooting Spring '13 ad campaign for the Jessica Simpson Collection. Doesn't get better than this!"

Jennifer Garner hung out in LA with her middle child, Seraphina Affleck, yesterday. Seraphina was decked out in her karate gear to attend a class in the afternoon. Jen was able to do pickups and drop-offs following a trip out of town. Jennifer Garner spent part of the week in New Orleans, where production will soon begin on her new movie The Dallas Buyers Club. Later this month, she'll start work on the picture, in which she stars alongside Matthew McConaughey and Jared Leto. While Jen was in Louisiana, her husband Ben Affleck stayed behind in LA to keep an eye on their three kids, Sera, Violet, and Samuel.

Ashton Kutcher and Mila Kunis were together to get sushi at LA restaurant Sugarfish yesterday afternoon. She was decked out in her workout gear for the occasion, and before they headed back home, Ashton was a gentleman and opened her car door. Ashton and Mila are back in California after a trip away. Mila and Ashton vacationed in Australia, spending time in Sydney at Bondi Beach and Bronte Beach. Their return meant Ashton was back to focusing on his small-screen work. He tweeted about his CBS series Thursday, writing, "So proud of my Two and a Half Men family!" He's still filming their current season and will welcome actress Brooke D'Orsay to the show as his love interest in episodes to come.

Kate Middleton wore a sharp pair of heels while out shopping at Harvey Nichols in London today. She paired the shoes with a long black coat, and wore her hair in an updo. Kate also brought out a great look earlier this week. Kate wore a Temperley gown, her second time donning the dress to a public event, when she attended University of St Andrews's 600th anniversary celebration at London's Middle Temple with her husband, Prince William. It was a special evening for William and Kate, who met while students at the Scottish school back in 2001.

It was a big week for celebrities between hitting the beach, cheering on their favorite teams, and hanging with their kids! Reese Witherspoon debuted her adorable son Tennessee Toth during a stroll in LA, while Beyoncé Knowles and Jay-Z spent a night rooting for the Nets in Brooklyn. A pregnant Gisele Bunchen showed off her growing belly in a bikini on the beach in Miami, and Kristen Stewart wore a colorful dress to stop by the Tonight show on the West Coast.

Don't miss out on all the other action that went down with stars this week. Click through the rest of the exciting pics!