Christer Engen (born 7 November 1974), also known by his stage name Chris Summers, is a Norwegian musician best known as the drummer for rock bands Turbonegro, Bigbang and Euroboys.

In 1998, Turbonegro disbanded while on tour due to singer Hank von Hell's drug addiction and mental illness.

He again contributed drums to Bigbang on their 2000 studio album, Clouds Rolling By, including the hit song "Girl In Oslo".

Unbeknownst to Turbonegro, in the years that followed their break-up, the band would become a cult phenomenon with fan clubs called Turbojugend being established all over the world.

[5] After leaving Turbonegro, Engen has occasionally featured as a session musician and works as a junior high school teacher.