Mark Hoppus is an American musician and record producer. He is the bassist/vocalist of pop-punk band Blink-182 and formed the synth-heavy side project +44 with bandmate Travis Barker. Hoppus has worked with Smrtdeath on the song adding up, with Pete Wentz on the song In Transit, and with Richard Gibbs on the song Until The Stars Fall. Hoppus has appeared in the films American Pie and the documentary The Other F Word. He hosted the Apple Music radio show After School Radio.