Diane (Chloe) arrives fairly early, but you should make her wait for Group 2. Use both bottles of champagne on her while she waits... but not too soon. Remember, she's very patient.

(It takes about 60 seconds for her thought bubble to to turn red, then 25 seconds before you lose points. After using champagne, it takes about 25 seconds before you lose points. That's a lot of time!)