Announcing to my sister-HELP!


So I need to tell my sister I am pregnant. I'd like to do it in a cute way that incorporates her birthday because I'm due ON her birthday! June 22nd. So I'm thinking of giving her an "early birthday gift". Shed be thinking I'm crazy! Haha but I'd like to put a note in it that says something along the lines of "your birthday will be extra special this year", "I'm telling you happy birthday now so I dont forget when I'm in labor", something cute like this. I need help with ideas please !!!