Over the weekend, Demi Lovato held a big party to celebrate her album, birthday, and graduation with all her closest buds! Now, Zack Taylor has posted these new pictures from one of Demi’s friends of their post-party. In one of the pics, there’s even a bottle of vodka! Just saying, just because there is liquor in the room doesn’t mean that Demi drank any, but nobody knows what really went down that night. source.