e ▁influ ences . ▁The ▁song ▁features ▁S ia ' s ▁" j aw - dro pping " ▁vocal ▁performance . ▁The ▁song ▁is ▁written ▁in ▁the ▁key ▁of ▁B ▁minor ▁and ▁it ▁follows ▁the ▁ch ord ▁pro gression ▁of ▁B bm – G b ma j 7 – Ab – F m ▁in ▁the ▁vers es , ▁G b ma j 7 – B bm - Ab ▁in ▁the ▁pre - chor us , ▁and ▁G b ma j 7 – Ab – Db / F – G b ma j 7 ▁in ▁the ▁ch orus . ▁ ▁L yr ically , ▁" Ch and el ier " ▁has ▁a ▁sad ▁theme ▁talking ▁about ▁" the ▁gl itter ▁and ▁fat igue ▁of ▁a ▁party ▁girl ' s ▁life ". ▁John ▁Walker ▁from ▁MTV ▁B uz zw orth y ▁op ined ▁that ▁the ▁song ▁has ▁a ▁dark ▁theme , ▁" to eing ▁the ▁line ▁between ▁celebr ation ▁and ▁self - dest ruction ▁as ▁it ▁becomes ▁increasing ly ▁more ▁bl ur red ". ▁The ▁song ' s ▁opening ▁lyr ics , ▁" Part y ▁girls ▁don ' t ▁get ▁hurt , ▁can ' t ▁feel ▁anything ▁... ▁I ▁push ▁it ▁down ", ▁are ▁s ung ▁over ▁a ▁reg ga e - infl uen ced ▁background . ▁Walker ▁noted ▁that ▁during ▁the ▁ch orus , ▁S ia ▁s ings , ▁" I ' m ▁g onna ▁swing ▁from ▁the ▁ch and el ier , ▁from ▁the ▁ch and el ier / ▁I ' m ▁g