There are the following words:
You're sooo cute!
You're sooo cute when you do that!
You're sooo adorable!
You're sooo adorable when you do that!
Or:
I want to kiss you so much right now!
(Has the added benefit of a possible reply of "Well, why don't you?")
Alternatively:
Play this song. (Hope it's the right one, won't load for me.)