Pink Strapless Prom/ Formal Dress

Bought this dress a week ago for prom, worn once ! It’s by the Jessica Angel collection and it’s super pretty I got many compliments. I’m 5’4 ish not sure, 118 lbs for reference. It has a train and I got it tailored where u can unbutton things inside the dress to let it down for pics, didn’t end up doing it but the length is perfect for all heights, since the train can be made longer or shorter. The boob area is friendly to all sizes I would say. Overall super pretty dress. Also there is a brown spot on the back, don’t know what it is but it can probably be washed with water.