Charlie Puth, Meghan Trainor Dating?: ‘Natural Boy Instincts’ To Blame For Intense Make Out Session On Stage At American Music Awards? [PHOTO, VIDEOS]

Charlie Puth and Meghan Trainor sent the Internet into overdrive as their duet at the American Music Awards Sunday concluded.

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Trainor actually began the performance on her own with her soulful hit "Like I'm Gonna Lose You," which features John Legend on her debut album, before joining Puth for "Marvin Gaye," which turned out to be a fun and eventually steamy performance.

In case you happened to miss it, the pair wound up intensely smooching at the end of the performance. It was a full-on make out session on stage that had many wondering if this was their way of announcing they're more than friends.

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The New England native was quick to praise Puth for his lip locking skills, beaming on Instagram with a snap of their passionate kiss, "All about dat ass grab."

"Proud of you Charlie," she added.

It should be noted that they have kissed before for the music video for this duet, but only a tiny snippet of the start of a kiss made it into the final cut.

Trainor mentioned in her Instagram post she is single and Puth explained on Twitter, "We are just friends."

How can anyone be "just friends" when that kind of passion is oozing out of them? Well, the New Jersey native told Johnjay & Rich exactly how the day after the kiss.

"I'm a very aggressive maker-outer, but Meghan is my friend, and I don't know, like my natural boy instincts kinda just like kicked in," Puth dished, adding, "So I was like all nervous before, like 'How am I going to make this look real, because I'm not attracted to her in that way?' She's like my friend."

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Charlie puth, Meghan Trainor