Hamlisch died at age 68 in August after a brief illness.Streisand did not perform I have Finally Found Someone at the 1997 Oscars, choosing to watch from the audience as Celine Dion sang the number.Streisand's addition is the latest indication that Zadan and Meron are putting a heavy emphasis on music, befitting their background on Broadway and producing such movies as Hairspray, Footloose and