We are still freaking out over this!
Check out both shots in the gallery (above)!
[Image via Annie Leibovitz/Vanity Fair.]
The boobs are coming out in full force tonight — must be the sin city atmosphere, LOLz!
But while the Reem Acra dress was certainly a sexy choice, what's with Olivia's hair?? It just seemed flat and boring…side swept curls would've flattered the dress perfectly!
But hey, maybe she just didn't want to distract from her killer curves. Can't blame her for that!
[Image via Getty Images.]