Have any card selected, signed and then returned to the deck. The signed card magically jumps to the top of the deck several times. This time place a large red heart sticker on the back of the signed card. And the card is lost in the deck.
Without any funny moves or cover the deck is tapped on the back of the spectators hand. The heart INSTANTLY and VISUALLY appears on the back of the top card. This card is turned over and is the spectators signed card.