Shay, 32, was seen walking around Los Feliz, California.
Her baby bump was on display in a vintage shirt that featured a photo of Britney from her "... Baby One More Time" years.
The former Pretty Little Liars star accessorized the look with a chic pair of sunglasses.
She appeared to be in great spirits during her west coast outing.
Shay announced that she's expecting her first child with boyfriend Matte Babel on Friday, June 28.
The You star suffered a miscarriage last year and shared the sad news with her fans on New Year's Day 2019.
“Although it was an amazing year it didn’t come without hardships,” she wrote in her Instagram Story. Shay then shared a sonogram photo alongside a broken heart emoji.
What are your thoughts on Shay's vintage Britney look? Sound off in the comments!