In this "Princess Diaries" meets "Cinderella" scenario among the romantic comedies on Netflix, "The Royal Treatment" stars Laura Marano as hairstylist Isabella, who gets the opportunity of a lifetime when she and her crew of stylists get booked to work a royal wedding. But things get hairy when Isabella falls for the handsome, to-be-wed Prince Thomas (Mena Massoud) and complicates an already-arranged marriage.