I STILL think that dress is perfect for Alexa and this event, because she's wearing an edgy Brit designer and she stays loyal to her own style (perfect shot of look in #486). Plus she looks AWESOME in it. It's very modern, hip, and young. It's exactly right for her. And the matching purse is killer.
If only she had worn a darker shade of lipstick and did something different with her hair - maybe an updo?