 According to the sheet music published at Musicnotes.com by Alfred Music Publishing , " Crazy in Love " is an R & B and pop love song , composed in the key of D @-@ minor and F @-@ major . It incorporates 1970s @-@ style funk , hip hop , and contains influences of soul . As commented by Robert Webb of The Independent , the old soul influences in the song seem to have been derived from the horn hook , which samples the 1970 song " Are You My Woman ? ( Tell Me So ) " . Having a go @-@ go vibe , " Crazy in Love " is built on a hip hop beat . Beyoncé told The Sunday Herald that the beat is " so hard that it makes your heart hurt . " The song 's tempo is a moderate 100 beats per minute , in common time . Beyoncé ’ s vocal range spans around one and a half octaves in the song , from the low note of A ♯ 3 to the high note of <unk> . " Crazy in Love " uses two major chords , B ♭ and G , a minor third apart . One of the main vocal riffs uses the traditional <unk> rhythm often found in <unk> music . Lisa <unk> of The Times magazine , wrote that " Crazy in Love " makes use of big drums and bits of brass . 
