Okay, Cassie’s ‘do is somewhat starting to grow on us, mainly because it seems as though she’s gotten a bit more comfortable with it and has learned how to style it. Its amazing what a little styling gel and a curling iron can do.

She and Diddy, along with fashion designer, Zac Posen, hit up the “The September Issue” premiere after party at The Museum of Modern Art last night. (Guess Diddy didn’t invite Dawn to tag along as well, because she was busy.)

If you haven’t heard, “The September Issue” is a film that takes an exclusive, behind the scenes look into the life of Anna Wintour, the legendary editor in chief of Vogue Magazine. (Somewhat like a real life Devil Wears Prada, if you will.) For obvious reasons, anyone who’s anybody in fashion in New York was probably at the film screening last night.

Take a peek at the trailer after the jump.