Special: Some 32 stars are on hand for a musical gala marking the Los Angeles Bicentennial. Among the highlights: a song-and-dance tribute to Busby Berkeley, headlined by Carol Lawrence; and a salute to the Hollywood canteen of the '40s with Toni Tennille and Peter Marshall. Hosts: Lorne Greene, Natalie Wood, Donald O'Connor, Greer Garson, Eve Arden, Twiggy and Dionne Warwick. Music: "Pennies from Heaven" (Rosemary Clooney), "Don't Leave Me This Way (Thelma Houston), "Never Never Land" (Leslie Uggams) and "Together" (Peggy Lee).