Don't Let Him Know

"Don't Let Him Know" is a song by the Canadian rock band Prism, written by Jim Vallance and Bryan Adams. It was the first single from the band's sixth studio album, Small Change (1981). "Don't Let Him Know" was Prism's biggest hit, peaking at No. 1 on the Mainstream Rock chart, and on the No. 39 the Billboard Hot 100. As a single it reached No. 49 on the Canadian Singles chart.