“Crazy in Love” is the debut single by R&B singer-songwriter Beyoncé Knowles, featuring rapper and now-husband Jay-Z. Producer Rich Harrison, Knowles and Jay-Z wrote the song for Knowles’ debut solo album, Dangerously in Love. “Crazy in Love” is an R&B love song which incorporates elements of hip hop and 1970s-style funk as well as soul music. The track features a sample from The Chi-Lites’ 1970 song “Are You My Woman (Tell Me So)”, used as the song’s horn hook. The lyrics reference a romantic obsession that causes the protagonist to act out of character.