Kolbrún has been in a few bands, playing bass in bob (w Matthías Arnalds, Finnur Pind and Friðrik Helgason), forming Brite Light (with Árni Rúnar Hlöðversson, Tinna Kristjánsdóttir and Unnur Kolka Leifsdóttir) and finally singing in duo Tricycle Cornersofa (with Gunnar Pétursson). Her partner Tom Oakes occasionally gets her to sing a bit as well. Here are some samples of her work in music. 

Tricycle Cornersofa