Barack hasn't officially won the presidency yet, but he's already smart enough to distance himself from hippity hoppers that might get the rally shot up:

"The Obama campaign has reportedly asked some of his famous supporters stay away from his rally Tuesday night in Chicago’s Grant Park, according to the Chicago Sun-Times. Although the campaign is reportedly grateful for the high-profile support, several prominent celebs have reportedly been asked “politely but very firmly” to skip the rally and focus on attending the Obama inauguration in January, should that occur."