We all know that most stars don't use their real names. They change them for many different reasons. There may already be an artist, author or performer with that name or a similar one.

Their name may be very difficult to pronounce or spell. Some artists just change the spelling or use a variation of their name. When you see some of their real names, it is obvious as to why they changed it.  Here is a list of famous folks who decided on an alias.

Charlie Sheen's real name is Winning, Duh!...Just kidding. It is Carlos Estevez.

Martin Sheen's real name is Ramon Estevez.

Lady Gaga's real name isStefani Germanotta.

Meat Loaf's real name is Marvin Lee Aday.

Pink's real name isAlecia Moore.

Judy Garland's real name is Frances Ethel Gumm.

Miley Cyrus' birth name is Destiny Hope Cyrus.

Katy Perry's real name is Katheryn Hudson.

Eminem's real name is Marshall Mathers.

John Wayne's real name isMarion Morrison.

Fergie's real name is Stacy Ann Ferguson.

Gene Simmons' real name is Chaim Witz.

Mark Twain's real name is Samuel Clemens.

Dr. Seuss' real name is Theodor Seuss Geisel.