[2] His main instrument is guitar but on his solo gigs he plays banjo as well.

Westerlund's career started in the beginning of the 1990s in a small Finnish city called Hamina when he founded Sweetheart, an experimental noise rock group, with his friends.

After Sweetheart, he released two albums of "organic electronica" with a trio called Chainsmoker [fi].

All the studio and live recordings with his past and present bands included, Westerlund has played on approximately 50 albums.

[5] In 2013 he started a collaboration with Jyrki Nissinen [fi], a Finnish cartoonist and musician, composing a soundtrack album for his comics book, Kehittymättömät ufot ("The Undeveloped Flying Objects").