If you thought listening to your girlfriend talk about her ex was uncomfortable, consider watching her sing to him in front of millions of people.

On last night's (November 30) episode of The VoiceGwen Stefani, who filed from divorce from Gavin Rossdsale in August, delivered an emotional rendition of "Used To Love You," a song widely considered to be written about Rossdale. And in the front row? None other than fellow judge/coach Blake Shelton, whom Stefani's been dating for a little more than a month.

In the clip above, Stefani, who's dressed in an ethereal white gown that might be better suited for a wedding day, is surrounded by NBC's own white-and-violet botanical garden. She remains stationary on a raised stage through the song's duration, but the performance is still pretty moving (WORDPLAY).

After the release of "Used To Love You" in October, Stefani told PEOPLE that her fans pressed her to explain the track's meaning in explicit detail, but she argued the lyrics pretty much spoke for themselves ("I don't know why I cry / But I think it's 'cause I remembered for the first time / Since I hated you / That I used to love you," the chorus laments).

"It’s funny when people try to go deeper into a song that’s already, like so spilling my guts,” she noted. “What else can I say?"

Watch the set above, and share your thoughts in the comments!

Gwen Debuts "Used To Love You" Live in NYC:

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