Here's a couple of Hello Kitty birthday cards using Provocraft's Hello Kitty patterned paper. I think that these papers are adorable - and I have more cards planned.
I added a die cut, Flower Cupcake, from the Baby Steps cartridge and glued stickles to parts of the cupcake. For my second one, I used the Your Birthday die cut from Summer Celebrations. I matted the sentiment and the card front onto glittered card stock (had to see in the picture) and the heaviness gave it a curled look, which I fixed with red tape adhesive.