It is not uncommon for celebrities to undergo multiple plastic surgeries or cosmetic procedures in the pursuit of perfection. But some celebrities will go to dangerous, and sometimes life threatening, levels to preserve their youth.

We all remember when the beautiful The Hills star Heidi Montag appeared to have turned her entire body into plastic after undergoing more than 10 painful procedures in 10 hours. She had a nose job, a breast augmentation, a buttocks augmentation, a chin reduction, fat injections in both her cheeks and lips, liposuction on her waist, thighs and neck, a mini brow lift, botox, and had her ears pinned back, according to Starcasm.net. Heidi reported to have almost died post surgery after being given too much Demerol, a pain reliever that can cause shortness of breath. “I wasn’t told really the repercussions and what would happen, emotionally and physically and the pain I would be in. I was kind of in shock,” she said in a 2010 interview with Access Hollywood.

Heidi is just one example of the countless celebrities who have become addicted to plastic surgery. Now, you might be wondering why a doctor would perform such extreme and dangerous procedures on someone. In many cases, a patient will be turned down by several doctors before they find one who is willing to take the risk. Reality TV star Lacey Wildd, whose breasts have reached a triple-L after several procedures, reported that 100 doctors refused to perform her next augmentation before she found one that would. She denied her addiction on Bethenny, claiming that money was her only incentive.

In addition to extreme plastic surgery, celebrities undergo other shocking cosmetic procedures in an effort to maintain their beauty. Kim Kardashian suffered through a “vampire facial” on an episode of Kourtney and Kim take Miami, in which her own blood was taken and then injected into her face with needles, according to Hollywood Life.

Dr. Natalie Wilson, a women’s study professor at California State University, provided insight as to why individuals feel compelled to tweak and alter themselves. “It’s acceptable, expected, and you can get it on your lunch break,” she told WebMD.