The 10 Hottest Celebrity Abs

10. Alessandra Ambrosio

She doesn't have an unneeded ounce of fat anywhere on her body, so should it surprise you that her abs look immaculately flat, in grand Victoria's Secret style?

9. Shakira

For someone who's not a professional hula hoop-er, Shakira sure spends a whole lot of time swiveling her hips. Those gyrations add up over time, and the result is a flawless midsection. Hips may not lie, but those abs tell us that hard work pays off.

8. Lisa Rinna

Wow. Who knew that Lisa Rinna was packing such a sculpted stomach all this time? It's no secret that she's an attractive lady, but for a 48-year-old woman, those muscles are positively jaw-dropping. Way to outshine starlets half your age, Lisa.

7. David Beckham

As a soccer player, it makes sense that Beckham would have a toned torso. As the husband to Victoria Beckham, however, rockin' abs are demanded. And as an international sex symbol, shirts are entirely optional.

6. Gisele Bundchen

Are tight abs any less impressive when they're on someone required by contract to look good? Gisele has a whole staff of people trained to keep her glam and probably a small subset of them concentrating on her abs alone. All that said, those are some fine-looking abs right there.

6. Matthew McConaughey

The Matthew McC plan for abdominal fitness: surf, swim, get some sun, run (with shirt off), play with a dog wearing a bandana for a collar (again, take your shirt off), play a little hacky sack (shirt off, natch), have a brewski (why even own a shirt?) and then enjoy your perfect abs.

5. Cristiano Ronaldo

Don't follow soccer? You're missing out on one of the best sets of abs in the world of athletics. Cristiano Ronaldo, a striker for Real Madrid, is a stand-out player with a stand-out body and a penchant for going shirtless. Why is it, again, that you don't like soccer?

4. Gwen Stefani

Stefani, a mother of two, has such a washboard tummy that you might guess that crunching was, like, her job or something. It's not. She's also a performer, singer-songwriter, fashion designer and occasional actress, so how she finds time to make her abs look that good is anybody's guess.

3. Taylor Lautner

Sure, he's looking down in this photo, but anyone who's seen the "Twilight" movies -- or, you know, the Internet -- should recognize Lautner's trademark abdominal muscles. After all, it was pumping up those muscles that helped Lautner keep that "Twilight" role when producers thought about re-casting with a buffer actor.

2. Joe Manganiello

What is it with these werewolves? It's actually too bad that Manganiello is a part-time canine on "True Blood," because his wolfy moments take away from the precious time during which he can show off his chiseled abs. Of course, prowling for prey with the rest of the pack is, evidently, a great work out.

1. Zac Efron

Do not even try to argue the point: Zac Efron has great abs. They're the perfect complement for great hair, great skin, a great singing voice and the great muscles everywhere else on his body -- but even still they stand out on his frame.

Congratulations, Abs Absfron! Your dedication to the art of the sit-up has earned you the top spot on our countdown.