Will the magic work?

MC^2: Wedding proposal: "(Pulls out a card with 'Will you marry me?' in big writing)
(Show everyone else the card except her)
Now take a look, is this the card you had?
Wait wait.. I've still got one more trick behind your ear..
(Gently click fingers behind her ear, ring in hand)
I think you might like this too...
(Get on knees, look her in the eye)
Will you marry me?"

Good luck with your 'trick'.