Born in 1980, the Grammy Award-winning pop singer has several unusual tattoos, most notably the word "XTina" tattooed across the back of her neck. It's always a good idea to tattoo your name on your body, just in case you get in an accident where you develop amnesia and can't remember who you are. Of course, with over 30 million albums sold worldwide, Christina is probably well-known enough that she doesn't need the tattoo!

Anyone who thinks that female celebrities are not committed to their ink should check out this gallery of celebrity tattoo pictures! Most popular searches include Angelina Jolie, Britney Spears, and Pamela Anderson.