"Forever Plaid" comes to Cal State Northridge this weekend. The show offers a look at the musical flip side of the 1950s. Along with Elvis, Little Richard, Chuck Berry and Buddy Holly, such four-part-harmony guy groups as the Four Aces, the Four Lads, the Four Freshmen, the Hi-Lo's and the Crewcuts scored hit after hit throughout the decade. "Forever Plaid" is about a fictitious group and includes many of the great pop tunes of the era, including "Catch a Falling Star," "Heart and Soul," "Love Is a Many Splendored Thing" and "Three Coins in a Fountain."
* "Forever Plaid"; Saturday, 3 and 7:30 p.m.; Sunday, 3 p.m.; CSUN's Performing Arts Center, 18111 Nordhoff St. $29. (818) 785-8885.
The Debussy Trio will perform Saturday evening in Canoga Park. Harpist Marcia Dickstein, flutist Angela Wiegand and violist David Walther draw upon such diverse influences as French Impressionism, American jazz fusion, African Kora music and Hollywood to create a new chamber music for the 21st century.
* Debussy Trio; Saturday, 8 p.m.; West Valley Playhouse, 7242 Owensmouth Ave., Canoga Park. $14-$16. (818) 884-1907.
Los Angeles DreamShapers present "Luck, Lilts and Leprechauns," a St. Patrick's Day show, featuring storyteller Elena-Beth Kaye with music by Jon Hughes, Saturday in Encino. Kaye has performed as a storyteller for 10 years. She specializes in folk tales, myths and personal stories.
* "Luck, Lilts and Leprechauns" featuring Elena-Beth Kaye and Jon Hughes; Saturday, 8 p.m.; California Traditional Music Society's Folk Music Center, 16953 Ventura Blvd., Encino Park. $8-$10. (818) 704-4240.
The Topanga Symphony will give a free concert Sunday in Topanga. Musical director Jerome Kessler will lead his ensemble in a program that includes works by Schubert, Mendelssohn and Mauro Giuliani. Guitarist James Smith will be the featured soloist. Smith is chairman of the classical guitar program at USC.
* Topanga Symphony; Sunday, 3 p.m.; Topanga Community Center, 1440 N. Topanga Canyon Blvd. Free. (818) 999-5775.