The eighth-annual Jammies Awards for young contemporary musicians will be held at the Crest Theater Friday and young classical musicians at the UC Davis Mondavi Center Saturday, held by The Sacramento News & Review, in association with Betterworld Telecom and the Sacramento school districts. Contemporary night begins at 8 p.m. Pre-sale tickets are $10, and tickets are $15 if purchased at the door. The show is expected to sell out, so those interested in attending are advised to purchase tickets soon. Classical night, which is produced with the assistance of the Sacramento Philharmonic and California State University, Sacramento, Symphony Orchestras, begins at 7:30 p.m. with pre-sale tick