Meghan Trainor’s Fiance, Daryl Sabara, 'Sings on Every Song' on Her Third Album (Exclusive)

The judge on Fox's 'The Four' is gearing up to release her third full-length, which she says is all about 'being in love and happy.'

Meghan Trainor’s next full-length may be coming sooner than we thought!

The 24-year-old bride-to-be says that “album three is wrapped up” and it’s a total family affair.

“I’ve been in the studio every day with my family,” Trainor tells ET just before filming episode two of The Four: Battle for Stardom, which airs Thursday on Fox. “My entire family sings on every song and Daryl  sings on every song, and my father plays the piano and organs on one song.”

Trainor’s fiancé, Daryl Sabara, popped the question in December after more than a year of dating.

“It’s really special,” she says of the album. “It’s obviously me being in love and happy, and reminding myself to choose happiness and love myself.”

Choosing happiness doesn’t seem to be too much of a stretch for the singer these days. Trainor couldn’t help gushing, “I feel like a princess!” and soaking in all of her well-wishes since becoming engaged.

“I love this. I got seven congratulations already today,” she says with a laugh. “I’m like, ‘On what? Oh, yeah!’”

Sabara has become a fixture by Trainor’s side, but she admits that his professional feedback isn’t always the most helpful.

“He just tells me how perfect and beautiful I am all the time,” she says. “I’m like, ‘Yeah, but how’d I actually do?’”

The couple has yet to make any official plans for their nuptials. In the meantime, Trainor is busy mentoring new artists on The Four alongside Sean "Puffy" Combs, DJ Khaled, Republic Records exec Charlie Walk and host Fergie. Reflecting on her own time as an emerging star, Trainor says it wasn’t easy to score advice from big names at the time.

“I was the ‘Bass’ girl for a long time and I would introduce myself as, ‘Hi, I sing ‘All About That Bass,’ you don't know me, my name's Meghan Trainor,’ so I didn't know a lot of people,” she says. “But around album two, I got a lot of great advice. J.Lo was so nice to me and so sweet to me when I wrote with her. She told me to get a Pinterest and write down all of my visions, and I did that. I'm doing that now for album three. We're making a lot of pictures and putting them together, it's great!”