Jennifer Lopez and her family have a big day today. Max and Emme, Lopez's twins with ex-husband Marc Anthony, are celebrating their 5th birthday!

Can you believe it?! Doesn't it seem like just a short time ago that she even announced she was expecting twins? Now, the adorable duo is already out of toddlerdom!

And to mark the huge milestone, Lopez--in her typical, J.Lo over-the-top style--is pulling out all the stops. For the last month, she has been planning a "very colorful," rainbow-themed birthday party for her twins! Aww! How adorable is that?! Sounds like fun and the perfect idea for soon-to-be 5-year-olds!

In honor of their big day, we decided to take a look back at the cutest moments between Lopez and her twins. Check them out below and happy birthday, Max and Emme!