By Jessica Goodman
Updated October 28, 2015 at 12:26 PM EDT

Sleater-Kinney guitarist and Portlandia star Carrie Brownstein released her memoir, Hunger Makes Me A Modern Girl, this week, and Tuesday night she visited Late Show with Stephen Colbert to talk about if she’s “cool” and the difference between performing in a band and doing comedy.

But she also hung out backstage for a bit in which she debuted a special new, uh, song called “Somber Grrrl.” (What a way to honor the riot grrrl movement!) “Playing in Sleater-Kinney has been a great opportunity for me,” Bronstein says. “But sometimes I feel like it prevented me from performing the kind of music I personally enjoy. That’s why our hiatus was great. It gave me a chance to work on my favorite musical genre: traditional English folk ballads.”

Check out the skit and a clip from her interview with Colbert.