Great Explanations

Will a very pregnant Catherine Zeta-Jones perform at the Oscars?

Will a very pregnant Catherine Zeta-Jones perform the nominated song ''I Move On'' with Renée Zellweger? Well, it depends on how much ''razzle dazzle'' the eight-months-pregnant Zeta-Jones can display (she's expecting her second child with Michael Douglas in the spring). According to Zeta-Jones' publicist Cece York, the mother-to-be and Zellweger HAVE been asked to sing at the show, and Zeta-Jones hasn't ruled out the idea of performing. ''But the pregnancy is a huge consideration,'' York says. ''[Catherine] will be giving birth shortly after -- hopefully not AT -- the Oscars.'' The larger problem might be the simple fact that it's a two-person number. Months ago, when asked by Entertainment Weekly how she felt about performing live, Zellweger remarked: ''Oh, Jesus! It's not something I do easily in front of people.'' Could Zeta-Jones be left echoing her big ''Chicago'' number, ''I Can't Do It Alone''? An announcement is expected within the week.