Today Hilary Duff's son, Luca, turns three. While we're sure there's an adorable party filled with fun festivities planned, Hilary also shared birthday wishes for her young one in a more modern way — with a super sweet Flipagram that chronicles little Luca's life. "3 years buddy! 3 beautiful years! You make every minute worth while! We cherish all your firsts and all that is to come. Happy 3rd birthday my love #timesflying #whatayear," the caption reads. Set to Ray Lamontagne's lovely "You Are The Best Thing," the video flips through so many sweet moments, from beach days to nap time to toy car collections to Luca eating a watermelon bigger than his head. He definitely looks like a mama's boy. Check out the epic birthday tribute below. Well done, Hil. Happy Birthday, Luca!