What was Paul Davis's biggest hit?

Paul Davis's biggest hit was I Go Crazy, released in 1977, which became his signature song and one of most successful singles of 1970s soft rock era. I Go Crazy peaked at number 7 on Billboard Hot 100 and spent 40 weeks on Hot 100 chart, setting record at time for longest stay on chart, demonstrating its enduring popularity and slow burn success. Song was from his album Singer of Songs Teller of Tales and became classic ballad about heartbreak and longing, with soulful vocal performance and memorable melody that resonated with adult contemporary audience. While he had other top hits like 65 Love Affair which reached number 6 in 1982 slightly higher peak, and Cool Night which reached number 11 in 1981, I Go Crazy is considered biggest hit due to its longevity, cultural impact, and recognition as his definitive song, still played on radio and covered by many artists including Lee Greenwood and others. It also charted on country and adult contemporary charts. So biggest hit by chart longevity and legacy is I Go Crazy, though 65 Love Affair had slightly higher peak position, I Go Crazy remains most famous and enduring, establishing Paul Davis legacy as singer-songwriter known for heartfelt romantic ballads that captured emotional vulnerability, similar to timeless appeal of clean classic sound.