Backed by an orchestra, Linda Ronstadt will perform some of her best-known songs on Aug. 24 at the Universal Amphitheatre and Aug. 25 at the Glen Helen Blockbuster Pavilion. Tickets for both go on sale Sunday. . . . White Zombie and Pantera will be at the Forum on July 19. Tickets go on sale today. . . . Also on sale today is the Goo Goo Dolls, July 17 at the Hollywood Palladium. . . . The H.O.R.D.E. Festival’s July 27 date at the Blockbuster Pavilion--with Blues Traveler, the Dave Matthews Band, Lenny Kravitz and Rusted Root on the main stage--is on sale today. . . . Three Greek Theatre shows go on sale Sunday: Chris Isaak on July 13, King Crimson on July 27 and k.d. lang on Aug. 19. . . . On sale now for the Universal is a package of the Butthole Surfers, Toadies, Rev. Horton Heat and the Supersuckers on June 30. . . . Also on sale today is Dog’s Eye View, July 2 at the John Anson Ford Theatre.