They're so big!

Celine Dion has been struggling with grief following husband Rene Angelil's death earlier this year, but the singer allowed herself to have a day of fun at Disneyland with her three sons to celebrate her twins Eddy and Nelson's birthdays.

"They are holding their own and trying to make the best of what life’s giving them. [The twins] love Disneyland. They went for their last birthday," a source dished to People.

We can't believe how big 15-year-old Rene Charles has gotten! We also can't help but notice how long the twins' hair is!