California Highway Patrol spokesman Rick Quintero said a big van decorated with Imperial Stars' logo stopped on the southbound US 101 near Sunset Boulevard at about 10:30am on Tuesday and blocked four of the five lanes.
The driver took the keys and fled in another car then three musicians climbed on top of the van and began to perform.
Quintero said they were arrested and the truck was finally towed away around noon after causing a two-kilometre traffic jam.
Quintero said the musicians could face a charge of obstructing traffic.
The group, whose credits include "Traffic Jam 101", said on its website it is dedicated to helping homeless children.
http://www.wheels24.co.za/News/General_News/Bands-traffic-jam-session-20101013
(Hilarious!!!)