 The song received generally positive reviews from critics . Warren Truitt of About.com stated " Let 's Get Crazy " was a mirror of Gwen Stefani 's musical style . Allmusic reviewer Heather Phares described the song negatively , as a " fizzy caricature of pop " , drawing away from the original musical influences by Britney Spears , Christina Aguilera , and Avril Lavigne . Leah Greenblatt of Entertainment Weekly stated that the song was a " demographic " because of it is " electric guitar @-@ heavy confection " . Owen Gleiberman , also from Entertainment Weekly drew attention to the line " Everyone can rock out like a superstar ! " , saying it was " her mantra " . Gleiberman added that the song a " freeze @-@ dried [ version of ] Avril Lavigne " . When reviewing Cyrus ' Wonder World Tour , Jim Harrington , writing for The Oakland Tribune , described " Let 's Get Crazy " as " fun " . 
