Next Tuesday won't be the most lucrative fundraiser of the Obama campaign, but it might be the most glam. Calvin Klein, Anna Wintour, and Andre Leon Talley are chairing a fundraising event for the campaign, An Evening with Michelle Obama. Naturally, the aspiring first lady will be the main event, not her (occasionally sartorially-challenged) husband. But Michelle seems to have already made a deep impression on the fashion set: Talley and Hamish Bowles (who shares Miche's passion for purple) took time to lavishly praise her faux pearls, Jackie O. dresses, and Azzedine Alaïa belts in the Times last weekend. The $1,000-a-head fundraiser will take place at the Sikkema Jenkins gallery on West 22nd Street. Feeling especially generous or social climby? The standard $2,300 will score you a one-on-one photo with Mrs. O, and $10,000 will get you an invite to dinner at Calvin Klein's triplex on Perry Street.