What's the first rule of PR 101? When hosting a movie premiere, do not — I repeat, do not — prevent the media from mingling with the film's stars. At last night's Legally Blonde 2: Red, White & Blonde world premiere after-party at Christies in New York, security guards barred hundreds of guests — including yours truly — from entering a room populated by Reese Witherspoon and Co. (They claimed the room was filled to capacity. Lies!!) I did manage to get co-star Sally Field to comment on a possible ER return this season. "I don't think so," she said, pausing thoughtfully. "I loved it, but... I don't think so." Sounds like Norma Rae didn't really, really love it.