This is a lovely designed gown called Join in the Dance. It is one of the Special of the Day dresses at Lemania Indigo for 100L. It has a pretty slim skirt and matching flowered pumps in the same texture. The jewelry is from Dryad Designs called Carnivale. Dryad has a shop on the Lemania sim.
http://slurl.com/secondlife/Lemania/109/97/21/ Main Entrance to Lemania
http://slurl.com/secondlife/Lemania/109/141/21/ Dryad Designs