Happy Valentine's Day!

Today's mission was to pull off the best latte art heart possible on Valentine's Day.  Now, I actually don't pour hearts that often, so today was actually very challenging.  I don't think I have the right technique down, because all my hearts keep distorting right when I try to do a finishing pull through the middle.  Any suggestions?

The heart in the large picture is one I want to try to perfect.  I started releasing a small bit of foam, pinched it off as if I were to do a tulip, and then poured the next layer and pushed it into the first, resulting in that bold layer of crema between the white foam.  Cool effect, and eventually I could work my way up to making it look something like this.