On November 25, 2008, technical death metal band Amoral announced Ari as their lead vocalist. He made his vocal debut with Amoral in the studio album "Show Your Colors" May 6, 2009. The album is the fourth official release in Amoral's history but the first one with Ari Koivunen as their vocalist. "Show Your Colors" reached Finland's chart-position No 19 in the first week. The album was released in the UK May 11, in Germany May 22, in The US. and Canada June 9 and in Japan July 22, 2009. There are two singles released of the album: "Year Of The Suckerpunch" and "Gave Up Easy".