Physiology: Butt Implants?

Robb sent me the photos seen on this page and wanted to know if they were butt implants or Photoshop. Even the Snopes messageboard crowd can't agree. I wonder how she'd score on this equation devised by British boffins to measure the perfect female derriere. (Nice touch in the news article to get a quote from Sir Mix-A-Lot.)

Here are some jokes sent to Snopes by stupid readers. I like the airplane/Coca Cola/shoe one. But jeers to Snopes for having pop-up ads.