She showed up at the Scream Awards over the weekend looking like a real lady. See the pictorial evidence here.
I think she's sorta channeling the always-elegant Catherine Zeta-Jones.
Megan wore the dress as she was crowned queen of sci-fi at the 2009 Spike TV Scream festival. Fans voted her the award for her role in "Transformers: Revenge of the Fallen."
England's The Daily Mail declared Megan the "belle of the ball" in her curve-hugging red halter, and I must agree.
That must be the dress she bought with that seven-figure salary she just scored to model undies and jeans for Armani.