Samantha Giancola (born March 1987), also known as Sammi Sweetheart, is an American television personality. She is best known as one of the eight main cast members in the MTV reality series Jersey Shore. Samantha Giancola (born March 1987), also known as Sammi Sweetheart, is an American television personality. She is best known as one of the eight main cast members in the MTV reality series Jersey Shore.