Leona Lewis recorded the hit track "We Found Love" before Rihanna released it last year.

She said, "It was the same version and production but mine's better. I still have the recording but I'd never leak it. That's so unprofessional."

Lewis isn't the only artist who passed on a future hit:

• TLC turned down the song that would make Britney Spears a household name: "...Baby One More Time."
• Though the song was originally written for Meat Loaf, Bonnie Tyler recorded "Total Eclipse of the Heart."
• Janet Jackson passed on "How Will I Know," which was then famously recorded by Whitney Houston.
• Sara Evans reportedly passed on the country ballad, "Jesus Take the Wheel," calling it "stupid." The song went on to become Carrie Underwood's first big hit.
• Hilary Duff was offered the track "Since U Been Gone," but the Lizzie McGuire star was afraid she wouldn't be able to hit the high notes, so the song went to Kelly Clarkson -- and straight to No. 1 on the US pop charts.
• Lupe Fiasco was almost dropped from his label after he passed on two tracks -- "Nothin' On You" and "Airplanes" -- which were then recorded by unknown rapper B.o.B and turned into hits.
• Jordin Sparks' "Battlefield" was originally offered to Rihanna, who turned it down following her now-infamous altercation with Chris Brown.
• Christina Milian passed on "S.O.S." -- Rihanna's breakthrough US hit. Needless to say, Milian was then dropped from her label.
• Though originally written and recorded by Pink, the singer passed on "Whataya Want From Me," which then went to "American Idol" singer Adam Lambert.

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