Sharon Osbourne doesn't want her MTV show anymore. In an interview with Barbara Walters airing tomorrow on ABC's 20/20, Ozzy's better half announced that the upcoming 10-episode second season of The Osbournes (bowing Nov. 26) would be the show's last. "We can't do it anymore," she said. MTV, naturally, is in downplay mode. On Monday, network president Van Toffler phoned Sharon and she reportedly told him: "You know you can't believe everything I say." Later, she released her own statement, reaffirming her commitment to do at least another "20 episodes. I love my MTV." Also on 20/20, Sharon revealed that her cancer diagnosis drove Ozzy to drink again.