Yoga, one of the world's oldest practices, has become a catch-fire fad over the past decade -- one that is still burning strong. In fact, an estimated 20 million Americans practice yoga. Included in that mix? Many of our favorite celebs. Scroll through the slideshow to see who's finding their inner balance. Some you might expect (cough, Madonna), but others may surprise you.
<a href="http://www.huffingtonpost.com/jean-fain-licsw-msw/self-compassion_b_861494.html" target="_hplink">Lady Gaga's yoga teacher</a> has instructed the performer to be kind to herself. Gaga says, "My yoga teacher Tricia always says: 'Please try every day to have 15 minutes of compassionate thoughts by yourself.'"
Jon Bon Jovi
Last year, <a href="http://www.menshealth.com/celebrity-fitness/jon-bon-jovis-best-list" target="_hplink">Bon Jovi told <em>Men's Health</em></a> that yoga was his preferred choice of workout, claiming to be a "21st-century man."
Everybody knows Madonna as a yogi. And she won't let us forget -- who remembers a few years ago when the Queen of Pop was <a href="http://www.dailymail.co.uk/debate/article-1340134/RICHARD-KAY-Queen-pop-enrages-upper-class.html" target="_hplink">caught doing her practice in the aisle of an airplane? </a>
<a href="http://www.thesuperficial.com/matthew_mcconaughey_gets_his_y-02-2009" target="_hplink">Craving some photos of Mr. McConaughey in action?</a> <em>The Superficial</em> has got you covered.
<a href="http://www.fitsugar.com/Michelle-Williams-Covers-Marie-Claire-Launching-Yoga-Single-Moms-Program-Boston-13198506" target="_hplink">Michelle Williams credits yoga for giving her "relief like nothing else."</a> She is a co-founder of the <a href="http://yogaforsinglemoms.com/" target="_hplink">Yoga For Single Moms</a> project in Boston.
The star tells<em> Zimbio </em> <a href="http://www.zimbio.com/Celebrity+Interviews/articles/182/7+Questions+Heather+Graham" target="_hplink"> "I do yoga</a> three times a week and I do pilates twice but I like yoga the best."
Sting and his wife, Trudie Styler, have been practicing yoga together for about 20 years. They once told <em>Yoga Journal </em> that <a href="http://www.yogajournal.com/lifestyle/3006" target="_hplink">yoga has brought them closer as a couple.</a>
Aniston got in shape for her recent flick,<em>Wanderlust</em>, with a combination of yoga and other workouts. <a href="http://www.shape.com/celebrities/celebrity-workouts/jennifer-anistons-yoga-workout" target="_hplink">Check out her routine on Shape. </a>
Dafoe is a long time yogi and has even been featured on some yoga VHS's (yes, that long).
<a href="http://www.fitsugar.com/Ellen-DeGeneres-Shape-May-2010-Cover-8097508" target="_hplink">Ellen practices slowly,</a> telling <em>Shape </em> that it is challenging for her to "slow down, to sit, to breathe and hold poses."
According to <em>People,</em> Paltrow <a href="http://www.people.com/people/gwyneth_paltrow/0,,,00.html" target="_hplink">"wakes up at 4:30 each morning to practice yoga."</a>
Quaid has taken a hint from his yoga-obsessed ex (Meg Ryan) and practices often.
<a href="http://www.oprah.com/oprahradio/Christy-Turlington-on-Yoga" target="_hplink">Turlington is a huge yoga advocate and has been practicing since her teens.</a> She even applied yoga's breathing methods during her natural childbirth to ease the pain. As she tells<em> Oprah</em>, "In terms of pain management, my breathing was the best thing I could do to manage pain on that level."
Martin squeezes in a daily does of Kriya yoga into his busy schedule. He tells <em>People</em>, "I just ask people, <a href="http://www.people.com/people/archive/article/0,,20133136,00.html" target="_hplink">'Can I have 20 minutes for myself so I can just breathe?'" </a>
<a href="http://www.details.com/health-fitness/celebrity-workout/201112/maroon-5-adam-levine-yoga-workout-video" target="_hplink">Adam Levine does yoga on the go.</a> He mentioned to <em>Details</em>, "At any Maroon 5 concert, you'll see a room backstage marked yoga."
<a href="http://www.azcentral.com/ent/celeb/articles/2010/12/12/20101212brad-pitt-angelina-jolie-couples-yoga.html" target="_hplink">Rumor has it</a> that Brad Pitt and Angelina Jolie do couples yoga together.
Sarah Jessica Parker
SJP tells <em>Good Housekeeping </em> that she is <a href="http://www.goodhousekeeping.com/family/celebrity-interviews/sarah-jessica-parker-jul06" target="_hplink">"fortunate enough to have things like private trainers and yoga classes.</a>"
Just look at Simmons' twitter feed (<a href="https://twitter.com/#!/unclerush" target="_hplink">@unclerush)</a> and you'll find yoga inspiration all over. This month he wrote, "The mind is like a monkey in a cage,it will jump around,when it realizes that the cage will not move it will settle, sit be patient #yoga."
In 2009 <em>Popsugar </em> caught <a href="http://www.popsugar.com/Photos-Drew-Barrymore-Tie-dyed-Leggings-Sunglasses-after-Yoga-Class-NYC-4191888" target="_hplink">Barrymore post-yoga in some interesting tie-dyed leggings</a> that she could really move in.