Harden My Heart

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"Harden My Heart" is the most popular single by the pop group Quarterflash, off their Quarterflash album, released in 1981. It became a Top 5 pop hit, reaching #3 on the Billboard Hot 100 and reaching the top of the Mainstream Rock Chart. It was the group's only Top 10 single on the Hot 100, although their second single did reach the Top 20.