Sebastian Philip Bierk, known professionally as Sebastian Bach, is a Canadian-American singer who achieved mainstream success as the frontman of the hard rock band Skid Row from 1987 to 1996. He has acted on Broadway and has made appearances in film and television such as Trailer Park Boys, The Masked Singer and Gilmore Girls. He continues his music career as a solo artist.

Skid Row is an American rock band formed in 1986 in Toms River, New Jersey. Their current lineup comprises bassist Rachel Bolan, guitarists Dave Sabo and Scotti Hill and drummer Rob Hammersmith, with Halestorm singer Lzzy Hale currently filling in on vocals. The group achieved commercial success in the late 1980s and early 1990s, with its first two albums Skid Row (1989) and Slave to the Grind (1991) certified multi-platinum, the latter of which reached number one on the Billboard 200. Those two albums also produced some of Skid Row's most popular hits, both in and outside of the United States, including "18 and Life" and "I Remember You", which peaked in the top 10 of the Billboard Hot 100, and other charting singles such as "Youth Gone Wild", "Monkey Business", "Slave to the Grind", "Wasted Time", and "In a Darkened Room". The band's third album Subhuman Race (1995) was also critically acclaimed, but failed to repeat the success of its predecessors. Those three albums featured the band's "classic" lineup, which consisted of Bolan, Sabo, Hill, drummer Rob Affuso and frontman Sebastian Bach. The band had sold 20 million albums worldwide by the end of 1996. Amid rising tensions, Bach was fired and Affuso left Skid Row towards the end of that year, after which the band entered a three-year hiatus.