Article continues below advertisementBella Thorne ditched her undergarments in a scandalous Valentine's Day look.The Disney alum, 28, celebrated the holiday alongside fiancé Mark Emms in a red gown exposing side b---.Thorne shared a photo dump on Thursday, February 19, recapping the romantic evening with her man.Article continues below advertisementSource: @bellathorne/InstagramBella Thorne is engaged to Mark Emms.In one snap, she turned to the side and showed some skin in the backless garment as she posed in front of a blue painting.