Per the Burbank ticketing website, here is the lineup (tier time slots added, groups are listed in order that they appear on the ticketing website):
[Saturday 7:40 pm] Advanced Mixed Tier 1:
Kennedy Executive Order
Brea Olinda Masquerade
John Burroughs Powerhouse
Los Alamitos Sound FX
Advanced Mixed Tier 2:
Hart Sound Vibrations
Bonita Vista The Music Machine
Diamond Bar Marquis
[Saturday 3:25 pm] Advanced Treble:
Brea Olinda Spellbound
Hart Heartbreakers
Kennedy First Ladies
John Burroughs Sound Sensations
Los Alamitos Soundtrax
Advanced Bass:
Los Alamitos Xtreme
John Burroughs Men @ Work
Hart Unleashed
[Saturday 1:00 pm] Intermediate Mixed (session 2):
Carlsbad Sound Express
Los Alamitos Connexion
Hart Hart N Soul
Golden Valley Melodies of Gold
Los Altos LA Dynamix
[Saturday 10:25 am] Intermediate Mixed (session 1):
Norco New Generation
Boulder Creek Broadway Bound
John Burroughs Sound Waves
John A. Rowland Infusion
Oceanside Soundwaves
[Saturday 8:00 am] Intermediate Treble:
Boulder Creek Heart & Soul
Brea Olinda Tiffany's
Diamond Bar Solitaire
John Burroughs Decibelles
Los Alamitos Xquisite
[Friday 7:40 pm] Novice Treble:
Eisenhower Ikettes
Los Alamitos Axcent
Novice Mixed:
Carlsbad Purple Reign
Saugus Blue Heat
Eisenhower HS Ike Singers
MLKHS Legacy
Esperanza Reverberation
Here’s the ticketing site. You can double-check there: https://www.itsmyseat.com/bhs/?fbclid=IwAR2EU7PHmPnV3VHt4YndWFIvl_Fdz3EyC5fF-1X2DjIvybg1inGeXSoehew