In my mind this (as with pretty much most songs) has a 50s jazz swing and is backed by a 21st century pop band. I’d harmonize with Ella Fitzgerald and Justin Timberlake. It all makes perfect sense.
I got carried away while cleaning the kitchen once.
Meghan Trainor is a goddess, her style makes retro relevant again, and the timbre and range of her voice is amazing. And more power to her that she can be a role-model for positive body image. I am a fan.
And when I figured out the chord progression to My Selfish Heart the other night, I wasn’t even disappointed to find out that pretty much the entirety of Title (her debut album) can be played with those same four chords. Because a) what pop song can’t? And b) I can now play all of Meghan Trainor’s songs on the piano! I recorded this discovery immediately on my phone, which is what I’ve attached above.