In case you didn’t catch Barack Obama’s presidential address last Saturday, this month marks fifteen years of BlackBook. We’re so excited that we published an entire issue loosely themed around it, and tonight, at the Olive Garden in Times Square, we’re throwing a party to celebrate it. (You’re invited!) But what would a 15th anniversary be without 15 former cover stars sending you 15 birthday cards? The answer is nothing! So with that in mind, here’s an exclusive gallery of birthday greetings from the 15 most thoughtful former cover stars a magazine could ask for.