Earlier in the day, the 31-year-old entertainer and mama-to-be brought Bronx and her mom Tina out to lunch at The Fish House.
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The 27-year-old singer walked arm-in-arm with her boyfriend as the two exchanged hugs and sweet kisses after their lunch.
After the party, Jessica and Eric headed to the Mexicali Cocina Cantina restaurant for a bite to eat.
15+ pictures of Jessica and Ashlee Simpson celebrating Bronx‘s birthday… More Here! »
The 27-year-old entertainer met up with Thierry Guetta, better known as Mr. Brainwash, at the fun event.
“Heading to the Mr. Brainwash studio in Hollywood for tonight’s @TMobile party. Fun night ahead!! #GoogleMusicLA,” Ashlee wrote on Twitter.
FYI: Ashlee is wearing alice + olivia by Stacey Bendet.
10+ pictures inside of Ashlee Simpson and Vincent Piazza at the launch of Google Music…
Jessica Simpson flashes a smile as she leaves her hotel on Thursday (October 27) in New York City.
The 31-year-old singer and fashion designer wore a tight grey top which appeared to be covering a baby bump. Jess hasn’t spoken about the rumors of a possible baby on the way.
In case you missed it, check out Jess in these BeautyMint promo shots for her new skincare line!
The singer and actress celebrated her 27th birthday on Monday (October 3) – happy belated birthday, Ashlee!
Late last month, Ashlee and Vincent hit the red carpet for the first time together for the BAFTA tea party, held at the L’Ermitage Beverly Hills Hotel.
FYI: Ashlee is carrying a Rebecca Minkoff bag.
15+ pictures inside of Ashlee Simpson and Vincent Piazza holding hands while out on her birthday…
The 26-year-old singer and actress carried a Chanel clutch to the chic event.
10+ pictures inside of Ashlee Simpson and Vincent Piazza at the BAFTA tea party…