<prompt> unaweza kugeuza matini haya ya swahilikwa kiingereza?miss afrika kusini, demi-leigh nel-peters ametwaa taji la miss universe 2017 katika shindano ambalo limefanyika usiku wa kuamkia leo kwenye ukumbi wa planet hollywood mjini las vegas, marekani.  <response>: demi-leigh nel-peters, who represented south africa, has been crowned the miss universe 2017 at the axis at planet hollywood in las vegas, nevada, united states. 