Tim O'Brien (born March 16, 1954) is an American country and bluegrass musician. In addition to singing, he plays guitar, fiddle, mandolin, banjo, bouzouki and mandocello. He has released more than ten studio albums, in addition to charting a duet with Kathy Mattea entitled "The Battle Hymn of Love", a No. 9 hit on the Billboard Hot Country Singles & Tracks (now Hot Country Songs) charts in 1990. In November 2013 he was inducted into the West Virginia Music Hall of Fame.