Celebrity Workout Quiz: Do You Know How Stars Get Fit?

Golf isn't just for old guys. Justin Bieber stays in shape by doing all kinds of activities like playing golf with his friends. He also works out with a personal trainer and has been spotted playing pick-up basketball.

Taylor Lautner does do a serious weight routine to keep his abs in shape. But usually, Robert Pattinson and Kristen Stewart aren't big fans of formal exercise. Instead, they like to ride bikes around the sets of their movies. Bike riding is a great way to move your body and stay fit! You can get hurt lifting weights if you don’t do it properly -- so make sure a parent or coach is with you.

There's no summer break for D-Wade. To stay fit and at the top of his game, Dwayne Wade likes to do a three-part workout during the NBA off-season. He does physical therapy exercises, plays some basketball, and then hits the weight room. To stay healthy, get up and move every day.

Usher loves his crunches. But you don’t have to do them every day to be healthy. Try mixing up what you do. One of Usher's favorite workouts  doesn't use fancy equipment or weights. It is something he calls "40 minutes of funk." To warm up, he'll skip to get his heart pumping. Then he does push-ups, tricep dips, and leg raises. He knows it is important to move his body to keep fit.

The Giants' quarterback takes spinning classes. In spinning classes, you ride indoors on stand-still bikes. Eli Manning says he likes spinning because it's fun. It's also a different kind of workout than he gets during the football season. Riding your bike is a lot like spinning and a great way to get moving.

Taylor Swift likes to run outside and sometimes she runs on a treadmill. But she doesn't go for jogs to lose weight. She runs to feel good and build up endurance for her concerts. Exercise like jogging keeps you healthy.

These pop stars do dance a lot when they perform. But that's not the only way they stay in shape. Both say they practice yoga to be fit. Try yoga, if you can -- it is a fun way to be healthy and de-stress.

Sure, Derek Jeter does a lot of types of exercises to train. But the Yankees shortstop starts off his workouts with basic exercises like jumping jacks. He does jumping jacks, lunges, push-ups, and arm circles. Try cranking out some push-ups during commercial breaks when you watch TV.

Katy Perry likes to jump rope because she likes to jump to the rhythm of music. She says she likes to listen to Madonna music when she exercises.

When he's not playing in games, the New England Patriots' quarterback does lift weights but he doesn't lift every day. He usually lifts four days a week. Tom Brady also does a cardio workout (like running) six days a week to get his heart pumping. Try running -- it is a great way to keep your heart healthy.