When the girls arrived, they were checked off the list and got backstage passes (like Brinley's party) and blow-up microphones. For the activities, we had karaoke going almost the whole time. While that was going, they could get their nails painted with crackle, hair colored, and/or make a guitar. So fun! It was great to get the shyer girls to do something before they broke out singing. I also took pictures of each girl to send them a thank you card with their picture on it.
After cake, we did presents and then freeze dance and "Rock Star Upset" is always a great go-to game since we had a little bit of time left. (It's the game "Fruit Basket Upset" but you can adapt it to any party.)