Earlier this year, Gwen Stefani announced that she was divorcing her husband of 13 years, Bush frontman Gavin Rossdale. Last night, Stefani performed at NYC’s Hammerstein Ballroom for MasterCard’s Priceless Surprises campaign, and she debuted an emotional new ballad seemingly inspired by the split: “Never thought this would happen/ I’ve let it sink in/ You’re gone,” she sings in the opening lines. People reports that the song was produced by J.R. Rotem. Presumably it’ll appear on her upcoming third solo album, and she’s hinted on Twitter that it’ll be released as a single shortly. Watch and listen below.

Oh my god what an amazing set! READY FOR THE ENCORE? Hold tight #NEWSINGLE in 5-4-3-2-1!!!!! xg #NYC #PricelessSurprises

— Gwen Stefani (@gwenstefani) October 18, 2015

UPDATE: Here’s the studio version.