For years, Jennifer Aniston has been on every fit list and best dressed list. While we all know that she's a dedicated yogi, she also likes to hone in on ab exercises. Aniston's longtime trainerMandy Ingber combines the calming nature of yoga with core-strengthening moves to create a killer workout. The key to Aniston's abs boils down to three simple moves: the boat pose with V-ups, forearm plank exercises and side forearm balancing, according to FitSugar.com. What, no crunches? Nope! Ingber swears that repetitions of these will do the trick. Watch the how-to video on FitSugar.com to master the moves yourself and target your tummy like Aniston does.