Celebrity Celebs' Coolest Summer Jobs Jessica Simpson launches a jeans line! Madonna designs and directs! Plus: Who ran for office and more star gigs By Janet Mock Published on August 18, 2010 05:00 PM Share Tweet Pin Email Trending Videos 01 of 13 BOOTY STYLING Jamie McCarthy/Getty Expanding her affordable-fashion empire, Jessica Simpson shows off her good jeans at the debut of Jeanswear, her new denim collection at her N.Y.C. showroom in June. 02 of 13 MAKING PERFUME Richard Young/Startraks Jennifer Aniston mixes up her style scents for the London launch of her signature fragrance in July. "I want people to go, 'What is that? You smell great!'" the actress said of the eponymous scent. 03 of 13 MODELING FOR MADGE Besides traveling on the Warped tour with her band The Pretty Reckless, Taylor Momsen fronts the ad campaign for Madonna's Material Girl fashion line. "Working with Madonna and Lola has been an unbelievable experience," the Gossip Girl star said of being styled by the music icon and her 13-year-old daughter. 04 of 13 DIRECTING A MOVIE Flynet Talk about a busy summer! Madonna takes on the role of director in July, getting behind the lens on the romantic drama W.E. in London. 05 of 13 SCOOPING ICE CREAM Albert Michael/Startraks Before teaching Chelsea Clinton to dance, DWTS pro Maksim Chmerkovskiy mans an ice cream truck, serving a cone to fellow dancer Tony Dovolani at an A/X Armani Exchange-sponsored event in L.A. 06 of 13 SELLING OUT ARENAS Mark Von Holden/WireImage While most 16-year-olds spend their summer cramming for the SATs, Justin Bieber performs for thousands of fans during his first major headlining tour in Trenton, N.J. "Thank you to all the fans that came and SCREAMED!" he Tweeted. "I love u ladies." 07 of 13 SHOOTING AN AD Flynet He's baaaack! Summer's hottest leading man, Mad Men's dapper Jon Hamm, takes a water break during a sexy photo shoot in downtown Los Angeles in July. 08 of 13 STARRING IN A PLAY Alan Davidson/PictureGroup Nick Jonas gets a standing ovation during his West End theater debut as Marius in Les Misérables – a play he starred in on Broadway as a kid. "What a night," he later Tweeted in June, "first show was amazing." 09 of 13 PENNING A MEMOIR Jackson Lee/Starmax If a new baby and a TV show weren't enough, Kendra Wilkinson hawks copies of her bestselling book, Sliding into Home, which she signs for fans at a bookstore in New York City in July. 10 of 13 PLAYING BARTENDER Pacific Coast News Speaking of reality TV moms: Bethenny Frankel beats the summer heat by whipping up SkinnyGirl margaritas – her new low-calorie beverage – during a cooking segment on The Early Show in New York in July. 11 of 13 RUNNING FOR OFFICE Ramon Espinosa/AP Grammy-winning artist Wyclef Jean gets the political party started while greeting supporters in Port-au-Prince, Haiti, after announcing his intention to run for president of his native country in August. 12 of 13 PERFORMING AT THE WORLD CUP Dylan Martinez/Reuters/Landov Those hips don't lie, but they sure can shake! Shakira performs at summer's most-watched event, the closing ceremony of the 2010 World Cup in Johannesburg, South Africa, in July. 13 of 13 REVVING ENGINES Splash News Online Dangerous curves ahead! Reality star Kim Kardashian makes a white-hot appearance as the official flag girl at the Amp Energy Bullrun Rally race, from New York to Las Vegas, in July.