INDIGO GIRLS, VANDROSS COMING IN FALL.(LIFE & LEISURE)

The fall concert season heats up with two concerts just announced.

The Indigo Girls will bring their benefit for ``Honor the Earth'' to the Palace Theatre at 8 p.m. Wednesday, Sept. 10. Tickets go on sale this Friday.

Tickets are $50, $27.50, and $22.50 and will be available at the Palace box office and all TicketMaster locations.

And soul balladeer Luther Vandross -- who has scored such major hits as ``Here and Now,'' ``Love Power'' and ``Endless Love'' -- will bring his current concert tour to the Pepsi Arena at 7:30 …