Kelis' 'Milkshake' was turned down by Britney Spears
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The Ones That Got Away: 18 HUGE Songs Turned Down By Other Singers

5. Kelis' 'Milkshake' was turned down by Britney Spears
This iconic female anthem was originally meant for princess of pop, Britney, for her 'In The Zone' album, but she turned it down. Luckily Kelis picked it up and made it just as amazing. (Pictures: YouTube/Getty)