"Crazy in Love" is the debut solo single by R&B singer-songwriter Beyoncé, featuring rapper and now-husband Jay-Z. (All Beyoncé's previous singles had been recorded and released during her membership in Destiny's Child.) Producer Rich Harrison, Beyoncé and Jay-Z wrote and composed the song for Beyoncé's debut solo album, Dangerously in Love. "Crazy in Love" is an R&B and pop love song which incorporates elements of 1970s-style funk and hip hop, as well as soul. The track's horn-driven hook samples instrumentation from The Chi-Lites' 1970 song "Are You My Woman (Tell Me So)." The lyrics reference a romantic obsession that causes the protagonist to act out of character.