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Gwen Stefani and Blake Shelton snuggle up in sweet pics after Billboard Awards

/ Source: TODAY

Blake Shelton and Gwen Stefani showed off their chemistry Sunday night at the Billboard Music Awards, as they took the stage to perform their song "Go Ahead and Break My Heart."

But the sparks kept flying long after they stepped off the stage.

When the show wrapped, Stefani shared a few snuggly backstage photos of her and her main man on Instagram.

MORE: Blake Shelton on Gwen Stefani romance: 'We could not be any more different'

And they were all smiles in a pre-show pic she threw in the mix, too.

Of course, these two have plenty to smile about. Not only do they have a love connection, they also have a country-pop crossover hit with their duet.

But during an episode of "The Ellen DeGeneres Show" airing Monday, Shelton admitted that he never imagined their song would go that far.

"I only started the song to impress her," he explained. "To be like, 'Hey, I’m writing a song about ya.'"

But suddenly he was the one impressed.

MORE: Blake Shelton: Writing duet with Gwen Stefani 'is so important to both of us'

"So I sent it to her, and then she wrote the other half of the song," he recalled. "I was like, 'Oh, she just one-upped me.'"

And he's just fine with that!

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