POP DATE BOOK

A fourth night, Dec. 30, has been added at the Universal Amphitheatre for the double bill of Kenny G and Toni Braxton. Tickets go on sale Sunday. . . . On sale today is Marilyn Manson, Jan. 25 at the Santa Monica Civic Auditorium. . . . Four new shows are on sale now for the El Rey Theatre: Cake on Jan. 24, Sebadoh on Feb. 6 and two dates for the Cardigans, Feb. 20 and 21. . . . Tickets are still available for the Gillian Welch show Sunday at the Ash Grove, just added to her sold-out appearance there tonight.