By EMILY MITCHELL/Reported by Wendy Cole

Will someone please call the Betsy Ross hot line? Madonna is wrapping herself in the flag--and not much else. "Get up and vote," she urges MTV viewers in a 60-second public-service spot that begins airing this week. Says she: "Voting is as important as having sex, because without either of them there is no future." On the tube she warns, "If you don't vote, you're going to get a spanking." Naughty, naughty, but the Republic has survived worse.