Ashlee Simpson: Bronx is a Batman Fan

Ashlee Simpson stays close to her son, Bronx, as they arrive at LAX airport on Sunday (December 4).

The 27-year-old entertainer had been in New York City and Toronto in support of the new Jessica Simpson Girls collection, which she co-designed with her big sis Jessica.

PHOTOS: Check out the latest pics of Ashlee Simpson

JustJared.com caught up with Ashlee recently, and she told us that Bronx celebrated his third birthday with a safari themed party. Fun!

FYI: Bronx is wearing a Junk Food Batman tee.