Who has Hollywood's most impressive abdominal muscles?

Hollywood is among the fittest area codes in the country, but even there, some abs stand out. (X17)

The No Doubt singer has become at least as famous for her <i>middle</i> as her <i>middle-of-the road</i> pop songs. Which is a <i>burn </i>akin to how many calories she must <i>burn</i> to keep such a physique. We could do this all day but we'll stop now.       (X17)

Hint: They were born in 1969.   (Smart Water)

So all it takes to get abs like this is drinking Smart Water? Best news we've heard all week! Okay that's enough quizzing, now we'll just show you some abs.  

"Dancing with the Stars" pro Karina Smirnoff's abs are seriously intimidating.  <a target="_blank" href="http://www.x17online.com/">Click here for more pics of her from X17</a>

Dakota's little sis is determined to keep her slim figure. The teen was spotted showing off her abs of steel while leaving a Hollywood gym. And she didn't even break a sweat.  <a target="_blank" href="http://www.x17online.com/gallery/view_gallery.php?gallery=2013/08/efanning082113_X17">Click here to see more pics of Elle's abs from X17.</a>

In Hollywood, a ripped stomach says "I am so committed to by bod, I do 867 sit-ups a day, which makes me better than you, so stop looking at me." For instance, take Kristin Cavallari. Sure she was a <i>meanie</i> on 'The Hills', but we can’t get past the <i>mean abs </i>on this reality blonde.  <a href="http://www.radaronline.com/photos/image/27285/2009/10/hottest-abs-hollywood">See more of athletic Kristin in a bikini at RadarOnline.com</a>, and don’t miss <a href="http://www.radaronline.com/photos/image/25021/2009/10/celebrites-who-were-once-athletes">a roundup of sexy stars that were jocks in school</a>! (© www.splashnews.com)

She rocked the world as a single Spice Girl, and can now be seen sporting a rock-hard stomach, along with a husband and kids. <a href="http://www.radaronline.com/photos/image/27313/2009/10/hottest-abs-hollywood#image-load">Ogle more Mel at RadarOnline.com</a>, and don’t miss <a href="http://www.radaronline.com/photos/image/25483/2009/10/courtney-cox-white-bikini-set-cougar-town">another celebrity mom with an amazing bathing suit bod, Courteney Cox! </a>! (Michael Williams)

He may defer to Robert Pattinson in the "Twilight" universe, but here on Earth he’s got a chiseled stomach so hard it would probably repel a vampire bite.  <a href="http://www.radaronline.com/photos/image/27292/2009/10/hottest-abs-hollywood">See even steamier pics of Kellan at RadarOnline.com</a>, and <a href="http://www.radaronline.com/photos/image/26189/2009/10/sophie-surfs">check out new shots of fellow hard-bodied blonde Sophie Monk surfing.</a> (� 2009_LIMELIGHT PICTURES_ INC.)

She has carved out a miraculous stomach for herself over the years, even after she gave up playing professional tennis. <a href="http://www.radaronline.com/photos/image/27298/2009/10/hottest-abs-hollywood">Get more grand slam bikini shots of Anna at RadarOnline.com</a>, and don’t miss <a href="http://www.radaronline.com/photos/image/25659">Britney Spears in brand new swimsuit pics</a>! (1)

A flat and defined dancer’s stomach is just one way Electra stays in the game.  <a href="http://www.radaronline.com/photos/image/27303/2009/10/hottest-abs-hollywood">Get more edible Electra in bikinis at RadarOnline.com</a>, and <a href="http://www.radaronline.com/photos/image/27020/2009/10/mirand-kerr-shoots-vicorias-secret">check out Miranda Kerr’s newest Victoria’s Secret shoot</a>! (www.startraksphoto.com�)

Her abs have stood the test of time.  <a href="http://www.radaronline.com/photos/image/27318/2009/10/hottest-abs-hollywood">Look at more lovely Seymour shots at Radaronline.com</a>, and see how she compares to <a href="http://www.radaronline.com/photos/image/15263">another bikini-modeling vet in Cindy Crawford</a>. ((c) www.splashnews.com)

On the first day of Christmas my true love gave to be, Patridge's abs in a pear tree. <a href="http://www.radaronline.com/photos/image/27280/2009/10/hottest-abs-hollywood">See more Audrina bathing suit shots here</a>, and don’t miss <a href="http://www.radaronline.com/photos/image/27369/2009/10/alessandra-ambrosios-beach-photo-shoot">another slammin' brunette with recent swimsuit shots of Alessandra Ambrosio</a>. (www.startraksphoto.com�)

The former "Desperate Housewives" star's belly shows no signs of desperation. Except maybe for food. <a href="http://www.radaronline.com/photos/image/27324/2009/10/hottest-abs-hollywood">Get a taste of more toned Teri at RadarOnline.com</a>, and check out other beauties with <a href="http://www.radaronline.com/photos/image/26078">sexy shots of actresses that can also sing</a>. (Mandatory Credit_ WENN.com)

Lopez wears many hats—actor, television host, eight-pack poster boy.  <a href="http://www.radaronline.com/photos/image/27331/2009/10/hottest-abs-hollywood">Head to RadarOnline.com for more ripped looks of Mario</a>, and check out <a href="http://www.radaronline.com/photos/image/7217/2009/06/taylor-lautner-through-years">the ab-tastic transformation of another hunk, Taylor Lautner!</a>

She's a Hollywood survivor, thanks in part to some of the best abs in Tinsel Town!  <a href="http://www.radaronline.com/photos/image/27308/2009/10/hottest-abs-hollywood">More bikini-clad Sheridan at RadarOnline.com</a>, and see <a href="http://www.radaronline.com/photos/image/26834/2009/10/javier-bardem-and-julia-roberts-bali">recent shots of fellow over-40 star Julia Roberts in her swimsuit</a>! (Sasha Lazic)

She's kept her insanely toned tummy even after giving birth. And for that, we thank her. <a href="http://www.radaronline.com/photos/image/27275/2009/10/hottest-abs-hollywood">Check out amazing Miranda bikini shots at RadarOnline.com</a>, and don’t miss <a href="http://www.radaronline.com/photos/image/26951">fellow Victoria’s Secret model Emanuela de Paula's latest swimsuit shoot</a>! (� www.splashnews.com)