Kerkko Klemetti Koskinen (born 7 January 1973)[1] is a Finnish musician.
Koskinen was the founding member and lead figure of the band Ultra Bra.
His most well-known solo songs are "Rakkaus viiltää" ("Love Cuts") and "Sateentekijä" ("Rainmaker").
Koskinen has worked as a talent scout for BMG and composed music for the Finnish films Upswing and Young Gods.
Furthermore, Koskinen wrote the song "Uuden ajan kynnyksellä" ("At the Threshold of a New Time") in memory of the murder of reporter Anna Politkovskaya.