Meghan Trainor Celebrates Son Riley's 4th Birthday with Trolls-Themed Cake — See the Photos!

Meghan Trainor's son is celebrating turning 4 with a Trolls cake!

On Sunday, Feb. 9, the singer, 31, shared a series of photos on her Instagram as she celebrated her son Riley's 4th birthday. In a video, the proud mom can be seen carrying a Trolls-inspired cake as the newly minted 4-year-old waited to blow out the candles.

Trainor also added photos of herself and her older son, who smiled and laughed alongside his mom. He is also seen laying in a ball pit with his younger brother Barry, 18 months, and driving through a pretend car wash in a green toy car.

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"RILEY IS 4😭 how do we have a 4 year oldddd!? An incredible 4 year old who LOVES life, his family, CARS, Paw Patrol, Trolls (especially Poppy), pizza, playing outside, watching music videos, laughing, and cuddling!" Trainor wrote in her caption.

"Riley boy, you bring so much light to this world. You are SO special and SO loved💙."

Trainor shares her sons with husband Daryl Sabara.

In January 2024, ahead of his 3rd birthday, Trainor told PEOPLE that her son had asked for a very specific cake that was inspired by something in their house.

"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,' " admitted Trainor. "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. 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.

She also opened up about transitioning from one to two kids, saying that it was everything that people warned her about.

"Everyone was right," Trainor affirmed. "It's the same but doubled. And when you have two, there are no breaks as parents. With Riley, it was like, 'Okay, I'll go get them, and you take a break.' Or, 'You go get them, and I'll take a break or I'll go shower,' moments like that."

"Right now it's like, 'Are you okay with both of them if I go pee?' There's a lot of hands on deck."