Aaron Carter Guesting On 'Sabrina'

13-year-old singer will play leader of beach band on sitcom's Friday episode, also featuring Frankie Avalon.

Aaron's party is coming to the WB — and the guest list includes none other than '60s teen idol Frankie Avalon.

Aaron Carter, the 13-year-old pop star and brother of Backstreet Boy Nick, is fronting a fictional beach band on Friday's episode of "Sabrina, the Teenage Witch," titled "Beach Blanket Bizarro."

On the show, Melissa Joan Hart's title character's first college spring break is tamed by a spell Avalon (playing himself) puts on the trip that launches Sabrina and her friends straight into a '60s beach movie.

Carter, whose "Aaron's Party (Come Get It)" was a hit single last fall, plays the teenage singer in the band. The 30-minute show airs at 8 p.m. ET.

Carter will support his second single, "That's How I Beat Shaq," with a 19-city U.S. tour that kicks off February 9 in his native town of Tampa, Florida, and also will feature his up-and-coming singer sister, Leslie Carter.