With the pressure they face to look good in Hollywood, many celebrities have succumb to some type of plastic surgery.

EnStars compiled a list of several stars who have gone under the knife.

1) Pamela Anderson removed her famous breast implants in 1999, but it wasn't long before she put them back in. The star reportedly wears a DD bra size.

2) Lil' Kim is often criticized for her transformed look. Media personality Wendy Williams also cracked jokes about the rapper on her talk show.

"It's filled so tight, Kim, it looks like a pin will just pop you," Williams said about her face.

3) While she's vehemently denied reports about plastic surgery, Suzanne Somers' face has changed immensely since she began acting in the '70s.

4) Kiss frontman Gene Simmons admitted to having a facelift in 2007. His wife, Shannon, also tagged along with him that day to have some plastic surgery done as well.

5) Mickey Rourke, a retired boxer and now acclaimed actor, has had work done but he's claimed it's not because he wanted to.

"I had my nose broken twice. I had five operations on my nose and one on a smashed cheekbone. I had to have cartilage taken from my ear to rebuild my nose and a couple of operations to scrape out the cartilage because the scar tissue wasn't healing properly," he told The Daily Mail in 2009. "Most of it was to mend the mess of my face because of the boxing, but I went to the wrong guy to put my face back together."

6) Former Olympian and now reality star Bruce Jenner has had a nose job and a few facelifts. He's never denied his surgeries.

7) While Simon Cowell may not have gone under the knife, the X Factor judge admitted to getting Botox injections.

8) Donatella Versace has undergone a series of surgeries. The designer's face is on almost every list of celebrity surgeries gone wrong.

9) Singer La Toya Jackson has also gone under the knife several times and has had an obvious nose job.

10) Original 90210 star Tori Spelling confessed to having her breasts augmented. The actress said she regretted the procedure.

"Well I got my boobs done in my early 20s and if I had known it would or could possibly have impacted production of milk I would never had had them done," she said on Good Morning America in 2011. "I love being a mom."