<b>KEEP ON TRUCKIN':</b> Lambert appeared at the L.A. County Fair in Pomona recently. Her latest album, "Revolution," is due out on Tuesday.

KEEP ON TRUCKIN': Lambert appeared at the L.A. County Fair in Pomona recently. Her latest album, "Revolution," is due out on Tuesday.

Francine Orr / Los Angeles Times /

KEEP ON TRUCKIN': Lambert appeared at the L.A. County Fair in Pomona recently. Her latest album, "Revolution," is due out on Tuesday.