The song received mostly mixed reviews from music critics. Beth Johnson from Entertainment Weekly referred to referred the song as “an update of Queen’s ‘Fat Bottomed Girls’. Sal Cinquemani from Slant Magazine agreed, writing that the song” is nothing if not a disco-fied exaltation to Queen’s ‘Fat Bottomed Girls’. John Murphy from musicOMH wrote a negative review, saying that the song is “an ode to the delights of the larger lady, wraps up its laudable message inside a tune that grates in the worst possible way. Graham Griffith from About.com wrote that” the disco-lite ‘Big Girl (You Are Beautiful),’ which includes an admirable sentiment, fails to distinguish itself otherwise. Liz Colville from Pitchfork said that it is “a pumping, chorus-infested jam session complete with gospel backup singers that tragically feels the need to reassure big girls they can be beautiful.
Lizzie Ennever from BBC Music wrote a positive review, saying that the track is “upbeat, poppy, all-singing, all-dancing, big-band.”  Alexander Berntsen from Sputnikmusic wrote a positive review, saying that the song is “an incredibly fun (and happy!) tune, a genius moment. Hilarious indeed.