Meghan Trainor is all about Nick Jonas' assistant Cory Andersen.

The 21-year-old "All About That Bass" singer and Grammy nominee has been dating Andersen for a few months now, E! News reported. A source told the publication that the two "'definitely' looked like a couple at an event in November."

"They are 100 percent courting," a source said. "Dating might be a strong word to use, but they are definitely seeing each other... She was at an event with him back in November at Philymack studios that Nick Jonas performed at. They weren't super PDA but definitely together."

Andersen shared a photo of him kissing his special lady on the cheek on his Instagram account, with a caption from her song "All About That Bass," writing, "Every inch of you is perfect from the bottom to the top."

Andersen changed his personal status on Facebook to "in a relationship," according to the Daily Mail. A source added that Trainor, who joined Jonas for the "Jingle Ball" holiday tour, has reportedly spent "a lot of time" with Andersen.

Representatives for the couple have denied to comment on the story.

When it comes to boyfriends, Trainor told E! News that she loves to "cuddle [and] make music." Adding, "But also be real cool and make me laugh. That's it. That's all you gotta do."