This lovely lady is Silver Sensation Daphne, from the 2005 Effanbee Brenda Starr line. She was a basic open edition doll, dressed in a silver swimsuit. (Thanks, Carolyn--I love her!) Here, she is dressed in DeeAnna Denton's New Look fashion from 2012 (Tonner).
While Daphne tends to be a coveted sculpt, you can often find this particular bendy-arm articulated doll for reasonable prices--close to her original $59.99 retail. If you don't have Daphne in your big-girl collection, I think you need one.
You can see a few more photos on Flickr.