Koop Juho Alexander Arponen (born 20 April 1984 in Lappeenranta, Finland) is a Finnish singer and the winner of the fourth series of the Idols in 2008.

In England he studied at the University of Hull Scarborough Campus and graduated with a BA degree in Creative Music Technology with Business Management.> He also used to play in local pubs and clubs.

[1][2] Arponen's father died in 2008, and after that he moved back to Finland to his grandmother's, who lives in the village of Pihlajavesi in Keuruu.

In the spring and summer 2009 Arponen toured Finland extensively, and in October 2009 he released I Love It When I See You Smile, a song he wrote for the breast cancer charity foundation Pink Ribbon.

In early 2010 Arponen and two other musicians, James Lascelles and Dane Stefaniuk formed an acoustic three piece band called Flute of Shame [1].