Matt Thiessen and Lowell George, both are Americans of which common occupation?
Matt Thiessen Matthew Arnold "Matt" Thiessen (born August 12, 1980) is a Canadian-American musician, singer and songwriter known for being co-founder, lead singer, guitarist, pianist, and primary songwriter for the Christian rock band Relient K. With Relient K, he has released eight full-length albums, including three that were certified Gold, and three that peaked in the top twenty on the "Billboard" 200. Outside of his work with Relient K, Thiessen maintains a low-profile side project called Matthew Thiessen and the Earthquakes. In 2009, he co-produced and collaborated on Owl City's album "Ocean Eyes".
Tris Imboden Gregory Tristan "Tris" Imboden (born July 27, 1951) is an American rock and jazz drummer. As an educator, he has been a drum clinician and author of tutorial materials. As a performer, he has been in studio sessions and on tour with some of the most notable and highest-selling musicians of all time. s of 1990 , he has been best known as the lead drummer with the multi-platinum band, Chicago. He is a multi-platinum selling artist.