"Crazy on You" is a song by American rock band Heart from their debut studio album, Dreamboat Annie (1975). It was released in March 1976.Heart lead singer Ann Wilson wrote the lyrics. The song opens with the acoustic guitar stylings of Nancy Wilson, Ann's sister and bandmate. She plays for 45 seconds before Roger Fisher's electric guitar blasts in. Nancy recalled how the instrumentation was inspired by a classic Moody Blues tune. "I remember I had a bad flu and was kind of delirious," she said. "The lyric was so great that it kind of lifted me up in...