The 22-year-old "All About That Bass" hitmaker is disappointed that she could not get time to make music with the "Uptown Funk" singer for her upcoming album, reported Female First.
"I love collaborating! I didn't get enough time this time on my album to really go out and write songs with other artists that I wish I could've but I didn't ... I love it!
"...You know I would love to sing with Michael Buble or Bruno Mars, I always sing along to their records and I'm like, 'Sounds great! We should do this!' And my mom would always say, 'You and John Legend would sound great together!' So when that happened it was one of those moments like, 'Oh my gosh!'," Trainor said.