Meghan Trainor Celebrates Son Riley's 3rd Birthday: 'Sweetest, Funniest, Most Delicious Little Human'

The "Mother" singer shares Riley with her actor husband Daryl Sabara

Meghan Trainor can’t believe she’s the mom of a 3-year-old!

On Thursday, the “Mother” singer, 30, marked her older son Riley’s third birthday with a sweet tribute on Instagram.

The post featured a carousel of family images and solo snaps of Riley, beginning with a smiling photo of Trainor and her actor husband Daryl Sabara cuddling up to their little boy.

“HOW IS MY BABY 3 YEARS OLD?!🥳🎂🎉,” Trainor captioned her celebratory post. “RILEY, YOU ARE SO LOVED! YOU ARE THE SWEETEST, FUNNIEST, MOST DELICIOUS LITTLE HUMAN. YOU HAVE MY WHOLE HEART ♥️ MAMA LOVES YOU TO THE MOON AND BACK! 🚀.”

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Related: See the Moment Meghan Trainor's Son Riley Meets His Baby Brother

Other pictures included Riley flashing a cheeky grin at the camera and looking through a magnifying glass, as well as snaps of him posing with his younger brother Barry Bruce, 7 months.

The carousel also featured two photos of the family of four posing together, with one showing them dressed in matching cream knitwear.

“🥹🥹🥹 I’m not crying you’re crying,” wrote Sabara, 31, in the comments section, while heiress and DJ Paris Hilton simply commented with a heart-eyes emoji.

“I can’t w how cuuuuuuute,” added singer Jewel, as actress Nia Vardalos chimed in, "What on earth, this is THE CUTE FAMILY!!! ❤"

Last month, Trainor opened up to PEOPLE about Riley’s big day and her plans, including his very specific request for his birthday cake.

"Every time I want to try to plan something, I'm always like, 'Eh, germs and people, and I don't want to ... He's not going to remember this one yet,' " said the mother of two. "But I do know that for a cake, he really wants it to be a car, a cake car."

"And it has to be specific. It has to be our white car that we have,” Trainor continued. “So I am literally hiring this amazing cake creator to make our Rivian car into a cake."

"I was like, 'What about Lightning McQueen car?' And he was like, 'No, white car,' " she laughed, referring to the popular character voiced by Owen Wilson in the Cars animated-film franchise.

Related: Meghan Trainor Gives Fans a Behind-the-Scenes Look at Her Kids' First Halloween Together

Trainor went on to show off the results of the creation on her Instagram Story Thursday, sharing a sweet snap of herself and Sabara posing with Riley and the impressive bake.

The sweet treat featured the family’s car decorated with red and blue bows, while the roof of the vehicle was covered with the number 3, pink clouds, a flower and a tree. The car was also surrounded by a road featuring tiny cars and grass personalized with Riley’s name.

The little boy proudly placed one hand on the cake in the photo as he stood between his parents, wearing a colorful striped sweater and a big smile.

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