Anna's actually wearing the same dress as the woman to the left of her in the photo, but Anna's curves fill out the wrinkles. 
Man, talk about bridesmaid upstaging the bride... !!
I'd suspect she might've had the stock bridesmaid dress altered to showcase her curves, and then "happened" to gain a few pounds before the wedding.
She fills out that dress like a second skin - and I mean that only in an extremely positive way!
Her boobs look the fullest, best shaped and most incredible I've ever seen her - OMG!
What a beauty!
Learn something new every day, too... I knew she was a singer/actress with model-grade looks, but I'd never known she was a pro skater. Explains that killer bod - but she really is amazingly multi-talented!
Give me enough time, even I can catch up.
Cheers,
-D'Artagnian