Lifestyle Style Stars Play the Field! Kim Kardashian! Jonas Brothers! Reese! See who's coming out swinging – and scoring a workout. By Serena Kappes By Serena Kappes Published on July 1, 2009 08:00 PM Share Tweet Pin Email Trending Videos 01 of 13 KIM KARDASHIAN London Ent/Splash News Online They may not be spikes, but they’re certainly spiky! The reality star (who Tweeted about her attire before the game) sports stilettos to throw out the first pitch before the Los Angeles Dodgers-Washington Nationals game recently at Dodger Stadium. Hitting the field was a perfect activity for Kardashian, who’s on a quest to get in better shape. 02 of 13 CARRIE UNDERWOOD AdMedia Proving she’s got more than just vocal talent, the country singer shows off her athletic form at the 19th Celebrity Softball Challenge at Nashville’s Greer Stadium, where she hit an RBI double for her Grand Ole Opry team last month. The American Idol star is no novice: She’s reportedly been playing softball for several years. Want to be a pro like Carrie? Learn about how you can join an amateur league in your area! 03 of 13 JOE JONAS Flynet To steal a base or not to steal a base? The pop star contemplates his strategy for the field during a pick-up softball game in Brentwood, Calif. Even a relaxed game of catch can shave calories – almost 150 in an hour. 04 of 13 NICK JONAS Flynet They’re teammates onstage and on the diamond! With his foot on home plate, the youngest JoBro joins brother Joe for a softball game in Brentwood, Calif. They’ve got the right idea in making fitness a fun family affair! Oldest brother Kevin opted to sit out the game – but cheered on his sibs from the sidelines. 05 of 13 REESE WITHERSPOON Ramey The actress, who’s logged hundreds of hours of practice for her role as a pro softball player in the comedy How Do You Know?, keeps her training going in L.A. It’s paid off: She’s not only worked up a mean pitch, but in one hour of throwing the ball, she could have burned more than 350 calories – that’s the equivalent of half a McDonald’s Big Mac! 06 of 13 JULIANNE HOUGH AdMedia Joking to PEOPLE.com that her “strategy is don’t let me near the ball” at the 19th Celebrity Softball Challenge in Nashville, the Dancing with the Stars pro turned country singer made up for her skills with spirit at the event, benefiting the Los Angeles cancer-care center City of Hope. Another bonus: Like dancing, softball is a total-body workout – great for the core and a surefire way to tone your arms from all that swinging. 07 of 13 CHUCK WICKS Judy Eddy/WENN Meanwhile, Hough’s country star beau reveled in the friendly competition. “Hit it to Julianne – the perfect strategy,” Wicks told PEOPLE.com about his plan to trounce her team, After MidnNite with Blair Gardner, in the Celebrity Softball Challenge. Turns out, according to Health.com, that getting active with your significant other is a positive way to motivate each other to reach fitness goals! 08 of 13 NICK LACHEY John Sommers II/Reuters/Landov The baseball fan lives out every Cincinnati boy’s childhood dream: throwing out the first pitch at a Reds opening-day game this year. The sport is a major part of the singer’s life; he’s also a part-owner of a Triple-A affiliate of the Seattle Mariners. 09 of 13 DANIELLE STAUB Brian Killian/Getty Leaving the onscreen (and real-life) drama behind, The Real Housewives of New Jersey star has a light moment at the Celebrity Softball Showdown on June 23 in Newark, N.J. Too bad her costars weren’t in on the action: After all, the ladies could use the togetherness of a team sport! 10 of 13 MARIO LOPEZ London Ent/Splash News Online It’s the Hottest Bachelor turned hottest pitcher! The buff Extra host – who’s written his own exercise book – winds up for the first pitch at the Los Angeles Dodgers-New York Mets game at Dodger Stadium on May 18. 11 of 13 QUEEN LATIFAH Maryannekis Demis/Sipa The rapper-actress flaunts her royal swagger at home plate as she prepares to swing one out of the park at the Celebrity Softball Showdown in her Newark, N.J., hometown. Besides being a great aerobic activity, softball also increases muscle strength and coordination. 12 of 13 WHITNEY PORT London Ent/Splash News Online From The City back to her L.A. stamping grounds, Port shows she’s a fashionista with power while hurling the first pitch during the Dodgers-Mets game. Maybe she prepped by studying her favorite exercise guide? 13 of 13 MATTHEW MCCONAUGHEY Lucy Nicholson/Reuters/Landov Talk about having a ball! The actor’s mitt fits him like a glove during warm-up practice before tossing the first pitch at Dodger Stadium on May 20. McConaughey shared his love of sports with the next generation: He brought along 50 kids from his j.k. livin Foundation.