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Gwen Stefani performs emotional ode to ex in front of Blake Shelton (VIDEO)

A celebrity gossip junky, Caroline Goddard has been writing entertainment news for longer than the world has known Kim Kardashian's name. Follow her on Twitter at @GoddardCaroline.

Gwen Stefani rocks single about her failed marriage on The Voice

Gwen Stefani belted a powerful performance of "Used to Love You" on The Voice, which her new boyfriend Blake Shelton surely appreciated.

Stefani looked stunning with big, wispy blond curls à la Marilyn Monroe, and wearing a flowing goddess gown while crooning the song she said she wrote in the aftermath of her painful breakup with ex-husband Gavin Rossdale — said to have been caused by him cheating on her with the couple's nanny, Mindy Mann.

Watch her performance below.

More: Gwen Stefani drops a huge bomb about her feelings for Blake Shelton (VIDEO)

More: Blake Shelton and Gwen Stefani prove their romance is more than just a rebound

The emotional middle finger to her ex brought new boyfriend Blake Shelton to his feet for a standing ovation.

Stefani previously told Carson Daly that the inspiration for the song came "the day after some crazy stuff had gone down, like, crazy stuff in my life. I've been writing stuff randomly, like, instead of going online and looking at stupid stuff, but being like, 'I'm just going to write. This is how I'm going to heal. I need to write.' And I went back in and found that lyric and then it ended up being the chorus of the song."

More: Gwen Stefani's marriage to Gavin Rossdale was literally making her sick

"I don't have anything to hide. Everybody knows that I was married forever and now I'm not. So, could you imagine what my life is like right now? It's crazy! I ended up going into the studio. On the way to the studio, that first time, I didn't want to go. I wanted to be in my bed, crying. And I did cry all the way down Santa Monica. 'What am I doing? Why am I doing this?'"

It seems Shelton has successfully dried Stefani's tears.

More: Even Christina Aguilera is talking about the Blake Shelton, Gwen Stefani romance

Gwen Stefani rocks single about her failed marriage on The Voice
Image: NBC

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