So we, citrusboy and I that is, decided to treat ourselves on Valentine's Day and thus we bought some very sticky, very gooey, very yummy Valentine's cupcakes.

Voila:
Now, as citrusboy pointed out, the heart just happens to say I'm your's. Is there ever an acceptable reason for writing I'm your's? Ever? Me thinks not. I think the bakery Chiquita was a teeny bit, um, overzealous in her application of the grammar rules. Wait! That's sexist! Maybe it was a guy...

On second thought, maybe not.
Which is my favourite Valentine of all time, by the way... How romantic!