The singer, 32, recently spoke with Extra about her new single "Still Don't Care," the first song off her new album Toy with Me, out in April. While discussing the record, Trainor revealed that her two sons -- Barry, 2, and Riley, 4, whom she shares with husband Daryl Sabara -- will be featured at the end of one of her songs.
"My two baby boys are at the end of a song called 'Little One' that I have," Trainor told the outlet. "It's like a little lullaby to them of like, 'Don't ever grow up. Don't do it.'"
"And at the end, they go, 'I love you, Mama,' " added the proud mom.
Back in August, Trainor spoke with PEOPLE about how her son Riley was heading to school for the first time this year. At the time, the mom of two said it was going to be hard for her to watch him head off on his own.
"He's about to start his first year, and I will be obliterated," Trainor told PEOPLE exclusively at an event in New York City. Riley also recently got to go to camp for the first time, and that was hard enough on the Grammy-winning mom.
"I brought him to camp for the first time ever and wanted to just evaporate," she said with a laugh. "I hated every moment of it. I cried, and not like a sad ... I was like, 'I hate this,' so school's going to be tough for me, but he loves it."
Trainor then joked that she might just pull her son out of school to hang out with her when they have a family event, or simply because she wants to be with him.
"I'm going to take [Riley] out [of school] as much as I can," she teased. "I'm going to call the school and be like, 'I’m so sorry, we have another family event.' I hope they’re cool with that."
In February, Trainor shared a series of photos on her Instagram as she celebrated her son Riley’s 4th birthday. In a video, the proud mom could 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 Riley, who smiled and laughed alongside his mom. He could also be seen lying in a ball pit with his younger brother Barry and driving through a pretend car wash in a green toy car.
“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💙.”