10 Musical Superstars You Never Knew Wrote Other Artists' Hit Songs

Having churned out hits like Chandelier, Elastic Heart, and chart-topper Cheap Thrills, Sia has had an extensive—and highly lucrative— music career. Hidden visage aside, the Australian singer/songwriter is also hidden beneath some of the biggest hits in the world over a spectrum of styles—she's penned hits for stratospheric artists, including Maroon Five, Pit Bull, and Eminem.

Have you ever heard of Rita Ora? Ne-Yo? Céline Dion? Aside from being musical powerhouses, all three artists have tapped Sia for lyrics—and they're only three of many. You—and Rihanna—can thank the well-respected and well-hidden artist for Diamonds, which was certified quintuple platinum—making the hit one of the best-selling singles of all-time. Penned for the Barbadian pop star's fourth album, Unapologetic, Diamonds became a global phenomenon and topped song charts around the world. How long did it take for Sia to write the tune? 14 minutes.

Fun fact: Beyoncé's Pretty Hurts as originally penned for Katy Perry, who never heard it. Rihanna's folks passed, so the lyrics ended up in Queen Bey's hands.