Jimmy Webb/Paul Williams: Feinstein's at the Regency, Nashville

WHEN YOU PUT Paul Williams and Jimmy Webb in a room, you basically have the collective soundtrack of the late '60s and '70s in pop music. What they didn't write -- as writers creating for others, as opposed to the work of writer/artists -- isn't worth having. And generations of Americans, indeed citizens from farflung points of the world, have their lives and defining moments tied up in songs like 'We've Only Just Begun' and 'MacArthur Park' and 'Evergreen' and 'Wichita Lineman.'