Promma Mia: This is the fourteenth episode of Season 3. It centers around Miley's promise to Aaron, a seemingly geeky guy at their school, and a last-minute phone call with David Archuleta (who guest stars as himself), asking her to sing a duet with him. Miley is torn between having to do the right thing and doing something only for herself. Although Lilly and Oliver are not part of neither the plot nor subplot, they have some moments in the beginning of the episode and their prom picture taken towards the end.