"I Go Crazy" is a song written, composed, and recorded by American singer-songwriter Paul Davis. It was the first single released from his 1977 album Singer of Songs: Teller of Tales, and his second-highest peaking pop hit, peaking at #7 on the Billboard chart in 1978. The song entered the Hot 100 on August 27, 1977 and began slowly climbing, peaking in March and April 1978, before dropping off the chart the week after May 27, 1978. Overall, it spent 40 weeks on the Hot 100, setting what was then the record for the longest run on that chart.

Paul Lavon Davis was an American singer and songwriter, best known for his radio hits and solo career that started worldwide in 1970. His career encompassed soul, country, and pop. His most successful songs are 1977's "I Go Crazy", a No. 7 pop hit that once held the record for the longest chart run on the Billboard Hot 100, and 1982's "'65 Love Affair", which at No. 6 is his highest-charting single. Another pop hit, "Cool Night", was released in 1981. In the mid-1980s, he also had two No. 1 country hits as a guest vocalist on songs by Marie Osmond and Tanya Tucker.