Despite most women's efforts to cover theirs up, the gluteus maximus propels maximum amounts of buzz. However, we must note we were saddened by this year's "Rear of the Year" awards in bum-obsessed Britain. The winners aren't household names, and the prestigious honor didn't pinch any buzz this time around. Still, there is plenty of other news about buns to keep us warm.

The bodacious backside of Kim Kardashian helped earn the socialite her own E! reality show, which is sure to stir up searches when it debuts this week. Slate recently ran an extremely popular photo slideshow on the history of buttocks and paid tribute to the tush. On top (or on bottom?) of all that, searches on "butt implants" eked out a modest gain over the past month.

With all these booties on the brain, we were curious to check out the top 20 derrieres. We sized up the bun searches on celebs and here's how the babies with back stack up...

A few bountiful booty notes...

—J. Lo continues to lead the way, but Kim K. is closing the gap. The burning question is: Will Jennifer's pregnancy affect her prized backside?

—Gorgeous Natalie Portman makes an appearance at #12 after baring her bum in Wes Anderson's "Hotel Chevalier."

—Britney's tush-exposing outfit at the VMAs sparked a resurgent interest in her rear. Gimme More, indeed!