Meghan Trainor Says Boyfriend Daryl Sabara's Fitness Encouragement Has 'Changed My Entire Life' (Exclusive)

The couple works out together.

Meghan Trainor has a very special trainer of her own! The almost 24-year-old pop star spoke to ET’s Keltie Knight at a press event for her new show The Four: Battle for Stardom on Thursday where she opened up about her new reality competition series and how her boyfriend, Daryl Sabara, has changed her outlook on health and fitness.

I was really excited because it’s brand new and it’s not what you've seen before,” Trainor said of the Fox show. “It’s very fresh and the reward is so amazing -- how they actually give you an opportunity to work with people in the music industry and to have a chance to be heard on the radio -- that’s just a no brainer for me.”

And as she gears up for new music and her new series, Trainor is also in the best shape of her life, thanks to Sabara.

“He's changed my entire life. He cooks for me and taught me how to cook,” she gushed. “He taught me how you can feel better if you eat healthier and exercise, even mentally. After my second surgery, I went into this dark place and he was like, ‘You want to workout?’ and I was like, ‘No, but OK.’ But now I love it. I’m obsessed with it, and I’ve never felt better.”

To get in shape, Trainor is using the Focus T25 with Shaun T workouts.

“It’s amazing. I bought the DVDs. I’m obsessed with it,” she said.

The Four: Battle for Stardom premieres Jan. 4 on Fox. For more from Trainor, watch the clip below!