You can find this dress in the scribo @ DandelionWine. What is cool about this dress is it comes with a hud in which you can change the dress to 4 different colors, white, black, pink, purple.
The skin is from the MM board @ PixyStix. There are 2 different MM boards there with the same skin in it other then the tones of the skin. The skin I'm wearing is on the right. It is also Tango friendly.
The hair is one of my favorite freebies, you can grab it from the bubble on the beach of Analog Dog. This hair and a few mesh hairs are there.
Dress: Mesh Lace Dress (Scribo) @ DandelionWine http://slurl.com/secondlife/Keauhou%20Beach/146/247/4070
Hair: Caught (Free) @ Analog Dog http://slurl.com/secondlife/Analog%20Dog%20Hair/85/221/22
Skin: Kira (Cupcake) (MM, 42 Slaps) @ PixyStix http://slurl.com/secondlife/Quenloo/16/233/49