Justin Pierre was raised in Mahtomedi, Minnesota. During his childhood, he enjoyed skateboarding and listening to hip-hop such as Run-DMC and the Beastie Boys. Pierre attended Mahtomedi High School, where he developed an interest in indie rock. Pierre played guitar and sang in a band called Slide Coaster, who released an album in 1995 titled Thrown. The group eventually disbanded, leaving Pierre to focus more on his hobby of making short films. However, his friend Joshua Cain convinced him to continue making music and recruited Pierre to join his band, which would eventually become Motion City Soundtrack.
Justin Pierre formed Motion City Soundtrack in 1997 with friend Joshua Cain, becoming the lead singer as well as playing rhythm guitar. He and Cain both previously took stints on the moog synthesizer in the band, until the foundation of the current lineup. Pierre was the primary lyricist for the band, noted for his pronounced sideburns, wild hair and glasses (which are Kirk Originals).
Motion City Soundtrack released its third album on September 18, 2007 entitled Even If It Kills Me. Pierre has struggled with alcohol and substance abuse problems in the past, and during the recording of the album Commit This To Memory, he relapsed and binge drank due to the ending of a relationship. Pierre suffers from asthma, having to use his inhaler on stage at times.
The band released its fourth album, My Dinosaur Life, on January 19, 2010. Pierre recently was "trucking along on The Dino Trail" to promote the album. He began his promotional tour in Chicago on November 1 and was making his way around the United States doing "meet ups, impromptu performances, in store appearances, and other shenanigans that will surely ensue along the way."
The band's 5th album, "Go", was released on June 12, 2012. The band's sixth album, "Panic Stations", was released on September 18, 2015.