Help looking for my prom dress?

I found a prom dress at Lord and Taylor and it was an Xscape design by Joanna Chen. The dress was a strapless short dress, with a magenta satin sort of band with a jeweled design over the chest, then it flowed out with a beautiful watercolor flower design. I can't find it anywhere on any website. Does anyone have any idea what dress I am talking about and where to find it? This would help so much! Thank you