And it certainly looked fun! The 20-year-old's mom shared a video of the birthday girl dancing in Mykonos to Calvin Harris' hit summer song
This Is What You Came For. Attached to the clip, Marie-Chantal wrote, "Happy birthday my gorgeous 20 Year old @olympiagreece I love you sooooo much! blessed to have you in my life and I love you to infinity and beyond #Mykonos." Photo: Instagram/@mariechantal22