The Prince and Princess of Wales Tweeted THIS PHOTO from the Princess's surprise Eurovision performance with Kalush Orchestra.

Her Royal Highness is wearing the Jenny Packham Marlowe one-shoulder gown. Buy it HERE and HERE!
Get the look for less here:
#KateMiddleton #oneshoulder #oneshoulderdress #oneshouldergown #bluegown #bluedress #JennyPackham #Eurovision #drapedgown