Some of your favorite songs were written by, and even FOR, other artists. Here are a few examples:
Gwen Stefani’s “Hollaback Girl” was written by the Neptunes . . . a.k.a. Pharrell Williams and Chad Hugo.
Christina Aguilera co-wrote “Miss Independent” for herself, but ultimately decided it was a better fit for Kelly Clarkson. Kelly’s “Breakaway” was also a hand-me-down from Avril Lavigne.
And while we’re at it, “I Do Not Hook Up” was one of Katy Perry’s leftovers. Apparently, Kelly has a knack for making gourmet meals out of sloppy seconds.
Jessie J. wrote “Party in the U.S.A.” for Miley Cyrus.
Sia wrote Rihanna’s “Diamonds”.
Bruno Mars co-wrote the Cee Lo classic “Forget You” . . . a.k.a. “[Eff] You”, as part of a songwriting trio called The Smeezingtons. (???)