While behind-the-scenes songwriters pen pop jams for superstars every day, it's another story when an artist takes a song previously released by another musician and makes it their own. Many icons on this list–like Whitney Houston, Nirvana, Christina Aguilera and more–took relatively obscure originals and gave them a whole new life, creating globally beloved hit songs. Still, the song's originators deserve credit. So here are 11 chart-topping songs you didn't know were covers.
Whitney Houston has no shortage of spine-tingling vocal performances to her name, but her take on Dolly Parton's pop-country single "I Will Always Love You" for The Bodyguard soundtrack might be her best ever. That soundtrack was the first record to ever sell one million units in one week following the implementation of Neilsen's SoundScan, and it became the best-selling soundtrack of all time, thanks in part to Houston's phenomenal performance. "I Will Always Love You" also re-debuted in Billboard's Top 10 after Houston's death in 2012.