On a slow day Petra decides to shake things up (literally) by playing with her boobs for a solid three minutes. Playing includes but isn't limited to shufling, squeezing and bouncing.

These wonderful booties belong to Ashley, Cali, Charlie, Dionne and Mica respectively. I really need to get a boat.

The very leggy, very cute Nina does a really good job rubbing lotion into her firm boobies before shaking them for the camera. Pretty much perfection as far as I'm concerned.

Sexy Talia strips as she gets sweaty lifting weights and stretching. She even gives her Shake Weight (or more accurately Handjob Exercise Machine) a go!

Jenn Kaelin seems like a revalation since we posted that photoshoot video of her a couple of days ago. Well we just found another one, this time she gets some help from Jenna Haze.

Emi, Freya, Tori and Dahlia shake their their thong-covered asses in this compilation. Featuring 'Let's Rock and Roll' from Charm City Devils.

Three hot bikini models perform a great booty shaking contest in their g strings! Meet the hot webcam girl contestants live at SoCalGlamourGirls

Wow, two of these in two weeks.. must be some sort of a record!

Webcam hotties Xesca, Jesse J, Tori and Coco doing some nice ass-shaking to a song perfectly suited for webcam videos. Almost as perfect as this one.

So speaking of amazing Brazilian asses.. here's Catia Carvalho Maravilhosa, well and truly shaking hers. There's even a bonus camel toe!

These booty videos can be hit or miss, but this girl sure can work it. So bouncy.

This joins such fine company of WTF products as the recently featured Kush Breast Support. I mean seriously, how much does this look like they're giving a handjob/blowjob?

Remember the so called 'Shake Weight' we featured a while ago? Well the fine folks at CollegeHumor have altered the audio to suit it better, with hilarious results!

Move over Shake Weight, there's a new handjob-like exercising machine in tow! Don't worry though, unlike the Shake Weight, this is just a spoof.

A whole bunch of hotties get their bikinis off to party with LMFAO at the Playboy Beach House. The song is called 'Get Crazy' and these girls don't need to be told twice!