The 50th Annual Los Angeles County Holiday Celebration

Also: Broadcast live on television on KCET and on radio at KPFK (90.7 FM) and streamed live at kcet.org.

When: Pre-show noon-2 p.m. and show 3-9 p.m. Thursday.

Info: Admission and parking are free. Patrons may come and go throughout the show. Seating based on availability. (Those waiting in line can watch the show on a JumboTron on the Music Center plaza.)

Contact: (213) 972-309 or www.HolidayCelebration.org

Schedule: Noon to 2 p.m.: Pre-show activities at the Music Center plaza include swing dancing, caroling, stencil-making and sending messages from an online-media station.

2 p.m. Dorothy Chandler Pavilion doors open

3 to 9 p.m.: Performances

(Lineup subject to change)

First-hour host: actress-singer Sheryl Lee Ralph 3 p.m. Mariachi Divas

3:10 Surprise guest

3:15 South Pasadena Children's Orchestra

3:25 Gay Men's Chorus of Los Angeles

3:35 Shin Dance Company

3:40 Los Angeles Master Chorale

4 Poncho Sanchez Latin Jazz Band

Second-hour host: singer Pat Boone 4:10 p.m. Harmonies Girls Choir

4:15 Kim Eung Hwa Korean Dance Company

4:20 L.A. Contemporary Dance Company

4:30 Opera California Youth Choir

4:35 ARC Handbell Choir

4:40 Vox Femina (choir)

Third-hour host: mezzo-soprano Suzanna Gúzman 4:45 p.m. Sharanya Mukhopadhyay (classical Indian dancer)

4:50 Audience sing-along

5 Definiens Project (experimental chamber music ensemble) and Vox Lumiere (multimedia performing arts company)

5:10 Salvation Army Tabernacle Children's Chorus

5:15 Element Band

5:20 Valleyaires Barbershop Chorus

5:30 Catch Me Bird (dance-performance duo)

5:35 Young Angels Choir

5:40 Conjunto Los Pochos (Mexican music ensemble)

5:45 Colburn Children's Choir

Fourth-hour host: actress-singer Tia Carrere 6 p.m. Klezmer Juice

6:10 Hollywood Master Chorale

6:15 JazzAntiqua Dance & Music Ensemble

6:20 Pacifico Dance Company

6:25 Burbank Chorale

6:30 Fishtank Ensemble

6:40 Christian's Community Center Cathedral Choir

Fifth-hour host: actor James Kyson Lee 7 p.m. Little Willie G. and Thee East L.A. Philharmonic

7:10 Church of Scientology Choir of Los Angeles

7:15 Antics Performance (street/hip-hop dance company)

7:20 Philippine Chamber Singers of Los Angeles

7:25 Harmonic Bronze Handbell Ensemble

7:30 Albert McNeil Jubilee Singers

7:35 Los Pinguos (Argentinean acoustic music ensemble)

7:45 Angel City Chorale

Sixth-hour host: actor Fred Willard 8 p.m. TAIKOPROJECT

8:05 M-PACT (jazz-pop a cappella ensemble)

8:10 Motion Tribe (aerial dance company) & M-PACT

8:20 Palmdale High School Choral Union

8:25 Lisa Haley & the Zydekats

8:30 Mt. Rubidoux Seventh Day Adventist Church Choir

8:40 Mariachi Sol y Reyna de Los Angeles