The crazy facts behind Britney Spears's music shows just how different her career might have been.There are plenty of unknown stories behind popular songs that have become part of our lives.
Some famous songs were initially rejected, written for someone else, by someone else, or have hidden meaning in the lyrics.
From Britney Spears' "Baby One More Time" to Bruce Springsteen's "Born in the U.S.A.," learn the surprising stories behind your favorite songs.