Rihanna's 2011 chart-topper "We Found Love" was one of her biggest to date. But did you know the song, which spent 10 non-consecutive weeks atop the Billboard Hot 100 chart, was actually originally recorded by another pop star before RiRi made it a hit? Leona Lewis has revealed she had her vocals on the Calvin Harris-produced track first, and she's not too proud to say she's green with envy about Rihanna's success with the song!

"I worked with Calvin and we recorded 'We Found Love,'" Leona told The Daily Star. "But he went touring with Rihanna and she ended up releasing it. I didn't commit to it because I wanted 'Trouble' to be my first single, so I think that was another reason they went with Rihanna."