Robert Lamm - keyboards, lead vocals
Terry Kath - guitar, lead vocals
Peter Cetera - bass, lead vocals
James Pankow - trombone, percussion
Lee Loughnane - trumpet, percussion, background vocals
Walter Parazaider - woodwinds, percussion, background vocals
Daniel Seraphine - drums
Home » プレイリスト » Youtube » Chicago - 25 or 6 to 4 (Live at Tanglewood, July 21, 1970)