▁an ▁all - A ▁c app ella ▁singing ▁group . ▁The ▁song ▁itself ▁is ▁a ▁mix ▁of ▁human ▁voices ▁with ▁limited ▁instrument ation . ▁Over ▁a ▁" bo oming ▁bass ▁line ," ▁Amy ▁ra ps ▁about ▁finding ▁Mr . ▁Right ▁and ▁real izing ▁he ▁wasn ’ t ▁so ▁perfect ▁after ▁all . ▁ ▁Crit ical ▁reception ▁" A cap ella " ▁has ▁received ▁mixed ▁reviews ▁from ▁music ▁critics . ▁Amy ▁Sci ar retto ▁of ▁the ▁website ▁Pop Cr ush ▁gave ▁the ▁song ▁ 4 ▁stars ▁out ▁of ▁ 5 , ▁stating ▁"' A cap ella ' ▁is ▁a ▁song ▁about ▁gain ing ▁your ▁independence ▁from ▁d udes ▁who ▁are ▁d ud s . ▁Th emat ically , ▁it ▁could ▁be ▁this ▁de cade ’ s ▁answer ▁to ▁' Single ▁Lad ies ', ▁without ▁being ▁quite ▁so ▁anth em ic ▁and ▁obvious ." ▁ ▁Adam ▁So y bel ▁at ▁blog ▁P OP ! ▁Go es ▁The ▁Ch arts ▁called ▁it ▁a ▁" c ute ▁song ", ▁not ing ▁that ▁" they ▁sound ▁like ▁they ' re ▁having ▁fun ", ▁but ▁at ▁the ▁same ▁time , ▁pointed ▁out ▁the ▁ris ks ▁of ▁re le asing ▁it ▁as ▁a ▁single . ▁Mike al ▁Wood ▁of ▁The ▁Los ▁Angeles ▁Times ▁gave ▁the ▁song ▁a ▁highly ▁negative ▁review , ▁stating : ▁" Re leased ▁last ▁month , ▁' A cap ella ' ▁is ▁bad , ▁no ▁doubt ▁about ▁it : ▁l ame ▁mel ody , ▁l ame ▁beat , ▁l ame ▁ra pping ▁by ▁He ide mann ,