Ashlee Simpson: Tis the Season!

Ashlee Simpson gets in some holiday shopping while out with a mystery male on Friday (December 7) in Santa Monica, Calif.

The 28-year-old entertainer carried with her a Red Bull energy drink to keep her awake for present shopping!

PHOTOS: Check out the latest pics of Ashlee Simpson

“Tis the season..got my lights up today. Fa la la la la la la la la” Ash tweeted earlier in the week.

FYI: Ashlee is wearing a Maje coat.

10+ pictures inside of Ashlee Simpson getting some holiday shopping done while out with a mystery male…