Jason Mraz (Dion) and Fefe Dobson (Tina Turner) are the guest impersonators on Bandstand, where Roxanne wants a hairstyling job. She also has boy woes: Lenny's return has clearly rattled Luke. Meanwhile, Beth makes a decision about her pregnancy; Nathan (Keith Robinson) is drafted, and Sam tries to get Meg to talk to Drew about his CO status; JJ's unit goes on a mission with a by-the-book new corporal (John Sloan); Jack considers his political options over coffee with Will's former teacher, the former Sister Grace (Robyn Lively); Will might be made to repeat fourth grade; and Patty uses hamster chips to get closer to Carl (Wes Robinson).

NICOLE RICHIE GUEST-STARS AS LEAD SINGER OF THE EXCITERS, HAYLEY WESTERNA AS A SINGER IN THE LAIR - When the Pryors meet their new neighbors, they are surprised and shocked to discover that Shelly Pierce is a single mom, a Playboy Bunny, and that her son, Chris, is old enough to attend East Catholic. As Meg continues her anti-war campaign, she is reprimanded at school by a progressive nun who decides that a better way for Meg to get her message out is to direct Shakespeare's play ""Henry V"", with a modern day twist. As Patty becomes obsessed with winning the Campbell's Tomato Soup essay contest, she seeks Donald's help, which causes some discomfort for Helen. Meanwhile, Sam is recuited for basketball at Penn, which concerns Henry, but provides a new girlfriend for Sam - in the form of his tutor. When Jack's campaign for city council begins to affect his family and professional life, he finds himself faced with questions only he can answer. Meanwhile, JJ's excitement to be with his new s