Julia attends her first birthday party and causes a ruckus

The birthday girls, Allie and Lauren

Julia plays peek-a-boo, as friends Carson and Grayson look on

Lauren flashes Julia

Julia and Allie ... Avery and Marty

The Ruckus

It all began with the idea to photograph all the babies wearing party hats...

Then Julia started it...

And Lauren joined in...

And soon everyone was crying and trying to escape

Fortunately, everybody cheered up and ate some cake (or sucked on a mylar balloon, as it were)