Rob Fitzpatrick of NME called " Crazy in Love " a " head @-@ nodding [ and ] body @-@ rocking funk @-@ soul genius " and wrote that it is " a 100 per cent , stone @-@ cold , dead @-@ cert classic " . He complimented Beyoncé ’ s vocals , describing them as " genuinely , hip @-@ grindingly fruity " . Los Angeles Times writer Natalie Nichols noted that " sexy dance tunes as the vintage funk @-@ flavored ' Crazy in Love ' " made Dangerously in Love a great album . Neil Drumming of Entertainment Weekly wrote that the song have a " fresh sound " . Spence D. of IGN Music wrote that Beyoncé ride the " infectious rhythm " with grace and mid @-@ range seductively . He added , " As [ it ] can be expected , the track bumps when Jay drop his distinctive uptown flavor . While other rap @-@ meet @-@ R & B tracks often fall flat , this one work well as Beyoncé and Jay 's verbals play nicely against one another . " Lisa Verrico of The Times wrote that Jay Z performed a " decent rap " , however , " Beyoncé and the beats save the day " and that " Crazy in Love " was a departure for Beyoncé from Destiny 's Child .