5 Most Bizarre Celeb Beauty Treatments Stem cells and bird poop and kitty litter, oh my! By Evann Gastaldo, Newser Staff Posted Jun 1, 2014 3:30 PM CDT 7 comments Comments Kim Kardashian arrives at the NBCUniversal Cable Entertainment 2014 Upfront at the Javits Center on Thursday, May 15, 2014, in New York. (Photo by Evan Agostini/Invision/AP) (Newser) – To prepare for her wedding extravaganza, Kim Kardashian got a $550 stem cell facial. No, it's not quite as icky as it sounds, but it is weird—the vegan stem cell serum that's applied to the face during the treatment uses cells from a marine plant, Us reports. The Lancer Dermatology procedure is said to firm and lift the skin. More strange beauty procedures of the stars: In 2011, Nicole "Snooki" Polizzi of Jersey Shore fame told Conan O'Brien she uses kitty litter as a facial exfoliant, Radar reports. "They've got rocks in there ... it makes your skin really smooth," she said. "I haven't broken out yet!" The weird thing Tom Cruise puts on his face? Bird poop. The actor is a fan of an expensive facial involving nightingale excrement. And he's not the only one: Jessica Simpson has also tried bird poop facial cream. Simon Cowell gets his vitamins ... by injecting them intravenously. The American Idol judge said the procedure makes him look and feel younger, but he got a "bad science" award from scientists who say it's probably not really benefiting him at all. Only the best for Angelina Jolie: She reportedly uses La Pairie's Skin Caviar Luxe Cream to fend off wrinkles, and it's exactly what it sounds like—a cream made with fish eggs. For more—including sheep placenta, snake venom, bee stings, wine baths, and leech therapy—click here.