If you are stuck on a theme for a party you'll be throwing at some point this year, check out popular girl birthday party themes for 2022 that we've rounded up for you! We've new entrants, such as sleepovers and Pop It parties that look like they'll be big in the coming year. We hope these on-trend ideas get you inspired!1. Sleepover Parties2021 was the year of the sleepover...