We love her, but we think she's taking things a bit far!

Gwen Stefani delivered a stunning performance of her new single "Used to Love You" on The Voice on Monday, and she not so casually threw in a dig at ex Gavin Rossdale while she was at it! "look at what you lost," she crooned while painstakingly looking into the camera.

The No Doubt front woman has made it pretty clear the tune is about her estranged husband, but that didn't stop current boyfriend Blake Shelton from giving her a standing ovation.

Heartbreak has really helped her churn out the hits apparently!