The trio will share the secrets of their success and craft during Q&A sessions at the fifth annual "I Create Music" Expo, once again taking place at the Renaissance Hollywood Hotel.
Last year's event, boasting headliners Jeff Lynne, Ann and Nancy Wilson of Heart and Chaka Khan, drew more than 2,400 attendees. About half came from out of state and overseas, a spokeswoman said.
A preliminary lineup of panelists this year includes jazz guitarist Kenny Burrell, Aerosmith and Bon Jovi songwriter Desmond Child, Prince protegees Wendy & Lisa, country star Phil Vassar, and ASCAP's Oscar-winning president Paul Williams.
Jones, the most honored living Grammy winner with 27 statuettes, is shepherding an all-star remake of "We are the World" to raise funds for Haiti earthquake victims.
Mayer topped the Billboard 200 last November with his fourth album "Battle Studies."
Withers, best known for such soul classics as "Lean on Me" and "Ain't No Sunshine," has largely withdrawn from active participation in the music industry.
COPYRIGHT: (c) Reuters 2009. All rights reserved. Republication or redistribution of Reuters content, including by caching, framing or similar means, is expressly prohibited without the prior written consent of Reuters. Reuters and the Reuters sphere logo are registered trademarks and trademarks of the Reuters group of companies around the world.