Paying to see "Clueless" is not really mandatory. You can learn most of the jokes by surfing the reviews and get a hint of star Alicia Silverstone's blithe luster by watching MTV's relentless promotions. Nevertheless, this is an enjoyable movie that says a lot about the needs of Americans in the mid '90s. As Cher, a popular Beverly Hills high schooler toiling as a matchmaker and makeover adviser to a clumsy friend, Silverstone is the model of conspicuous consumption: wanting, having and wearing, in style. But Amy Heckerling ("Fast Times at Ridgemont High") succeeds in getting the viewer to like Cher and her friends even as she pokes fun at them. "Silverstone is a giddy delight, a beguiling performer and an icon for her generation," saysTIME's Richard Corliss. "Catch "Clueless" quickly, though: in the MTV era, a generation lasts about a nanosecond."