Jessica Simpson made a big return to the public eye this weekend -- showing off her post-baby bod and sharing a ton of photos from her fiance's birthday bash.

The mother of two looked absolutely stunning and she and her friends all stepped out in Santa Monica to celebrate Eric Johnson's 33rd birthday. The night doubled as a b-day party for "Brothers and Sisters" star David Annable, who turned 34. 

The entire crew was seen going to Benihana for some dinner, before heading to AMF Bay Shore Lanes Bowling Alley on Friday night.

And did we mention Jess looked great?

Sporting straightened hair, dark eye makeup, a black and white blazer and a LBD, Jess looked sexier than she has in a while -- and it's great to see her out having some fun after welcoming baby Ace Knute back in June.

"Birthday weekend!!! I love you with everything and more and more and more," Jessica tweeted with a photo of the cute couple.

The singer shared a ton of photos from inside the weekend-long celebrations too, showing her with sister Ashlee Simpson and BFFs Cacee Cobb and Odette Annable

Check out the inside photos above! Happy Birthday, Eric!

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