Pharrell Williams, Gwen Stefani, Adam Levine, Blake Shelton Pharrell Williams, Gwen Stefani, Adam Levine, Blake Shelton

As coaches on The Voice, Adam Levine, Blake Shelton, Gwen Stefani and Pharrell Williams work with up-and-coming artists who want to turn their passion for music into a profession. So, it's pretty reasonable to ask how these superstar coaches knew they wanted to do that too.

In this exclusive behind-the-scenes video from The Voice (Mondays and Tuesdays, 8/7c, NBC), all four coaches reveal what got them started as musicians. Naturally, the always entertaining Shelton has a hilarious (and semi-crushing) story of how a bad case of high school heartache inspired him to become a songwriter.

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Check out the exclusive video below to hear Shelton's story and the rest of the coaches' motivational tales:

The Voice airs Mondays and Tuesdays at 8/7c on NBC.