Naomi puts aside her concerns about Jen's overspending when Liam asks her to the prom. Meanwhile, Annie accepts a geek's prom invitation to prove Liam is wrong about her; Adrianna goes into labor after Navid confronts Ty about his fatherly responsibilities; and Ryan takes Kelly's warnings about Jen as a sign of jealousy. The pop-rock band The Veronicas perform. ~ Rhoda Charles, All Movie Guide