Going South

* Stamp Show--The International Stamp Collectors Society presents its Stamp Expo/Valley this weekend at St. Nicholas Community Center in Encino. Hours: Friday, 11 a.m.-6 p.m.; Saturday, 10 a.m.-6 p.m.; Sunday, 10 a.m.-5 p.m. The center is at 17114 Ventura Blvd. Free. (818) 997-6496.

* Classical Concert--Internationally known Korean American pianist Seung-Un Ha will make her debut with the Los Angeles Chamber Orchestra on Saturday at the Alex Theatre, 216 N. Brand Blvd., Glendale. Ha first performed at New York’s Lincoln Center in 1989 and made her Los Angeles Philharmonic debut in 1998. She has performed throughout the country and in Germany, France, Scotland, Mexico, Brazil and Taiwan. Ha will play Mozart’s Piano Concerto No. 25. Saturday’s program will also include Lutoslawski’s Dance Preludes, featuring clarinetist Gary Gray. Show time: 8 p.m. $13-$53. (213) 622-7001, Ext. 215.

* Opera--The Valley Symphony Orchestra presents a semi-staged but fully costumed production of Verdi’s “La Traviata” Saturday at Valley College in Valley Glen. Robert Chauls will conduct. Show time: 8 p.m. The campus is at 5800 Fulton Ave. $10-$15. (818) 947-2346.

* Celtic Music--The Celtic Arts Center will present an afternoon of music and dance Sunday at its new location in Valley Village. The program will feature the Everything Celtic dance troupe and the band Highland Sun. Show time: 3:30 p.m. The center is at 4843 Laurel Canyon Blvd. $8-$10. (818) 752-3488.

* Jazz Concert--Famed jazz bassist Charlie Haden will perform with his Liberation Music Orchestra on Tuesday in the Main Gallery at California Institute of the Arts in Valencia. Haden won the 1998 Grammy for best instrumental jazz performance for his recording “Beyond the Missouri Sky” with Pat Metheny. Haden can be heard on more than 300 albums with such jazz greats as John Coltrane, Ornette Coleman, Joe Henderson and Keith Jarrett. Show time: 8 p.m. The campus is at 24700 McBean Parkway. Free. (661) 253-7832.