Gwen Stefani Debuts New Single "Used To Love You"

Gwen Stefani is NO stranger to sharing her emotions in her music!!! So when she Gavin Rossdale (her husband of thirteen years) announced their split, it was only a matter of time until she wrote a song about it. 

Last night at a surprise show in New York City she introduced her new song, 'Used to Love You' by saying: 

I just want to share a song that I wrote recently. This song is really special.

And if you listen closely, it is DEFINITELY about Gavin: