Spose began rhyming while he was in eighth grade, and started to pursue his rapping career in 2004. In 2007 he self-released his first album, Preposterously Dank.

In January 2010, Spose's single, "I'm Awesome", received significant airplay on Maine radio stations. In February 2010, after the song caught on in other parts of the United States, Spose signed a record deal with Universal Republic Records and announced that he would begin working on a music video. In March 2010, the video was filmed in Wells at the town-owned activity center where Spose had his first concert at the age of 14. "I'm Awesome" has reached #45 on the Billboard Hot 100.