This day and age, plastic surgery on celebrities is pretty much a dime a dozen. A Botox injection here, a rhinoplasty there, it's all part of the game.

Pop stars like Michael Jackson, Cher and Lil Kim have all taken their cosmetic procedures to the extreme, dramatically altering their signature looks in the process. Other celebs like Kelly Rowland and Ashlee Simpson have opted for more subtle enhancements to their bodies. As long as there are pop stars and plastic surgeons in this world, we can expect more of the same from celebs until the end of time.

Check out these before and after plastic surgery pictures of celebrities, and let us know your thoughts on these body modifications in the comments below.

Ashlee Simpson

Frederick M. Brown / Jason Merritt, Getty Images

Paula Abdul

Virgin / Kevin Winter, Getty Images

Kelly Rowland

Patrick Riviere / Lintao Zhang, Getty Images

Clay Aiken

Evan Agostini / Mike Coppola, Getty Images

Janet Jackson

Andreas Rentz / FrankMicelotta, Getty Images

Victoria Beckham

Bruno Vincent / MJ Kim, Getty Images

Aubrey O'Day

Peter Kramer / Frederick M. Brown, Getty Images

Cher

Douglas Miller / Michael Buckner, Getty Images

Lil Kim

Tumblr / Andrew H. Walker, Getty Images

Michael Jackson

Express Newspapers / Liaison, Getty Images