6:33 Quarterflash - Harden My Heart (Chris' Extended Mix) 5:29 Quarterflash ~ Harden My Heart 1981 Pop Purrfection Version 4:07 Quarterflash - Harden My Heart 3:34 QUARTERFLASH - Harden My Heart (1982) 6:31 Quarterflash - Harden My Heart (Extended) 6:00 Quarterflash - Harden My Heart (Extended 80s Multitrack Version) (BodyAlive Remix) 6:50 Quarterflash - Harden My Heart [1981] [magnums extended mix] 5:24 Harden My Heart (Extended)_Quarterflash 7:40 Quarterflash - Harden my heart - Extended Wolf 9:00 Quarterflash - Harden My Heart (Torisutan Edit Extended) 7:40 QuarterFlash – Harden My Heart (Extended Re-Mix 1981) 9:20 Quarterflash - Harden My Heart (New Disco Mix Extended Version 80's) VP Dj Duck 4:17 Quarterflash - Harden My Heart (Lyric Disco Mix Extended) VP Dj Duck 5:43 Quarterflash - Harden My Heart (Live In Tulsa 1982) 5:35 QUARTERFLASH - Harden My Heart (Live at the Hollywood Palace 1984) 3:53 Harden My Heart - Quarterflash (Remastered) 4:09 Harden My Heart | Live Band Performance (Quarterflash) | Sing it Live 3:47 QUARTERFLASH - Harden My Heart 1982 10:57 Quarterflash - Harden My Heart (Extended) + Valerie 1981