Quando aveva tredici anni, i suoi genitori le hanno comprato un computer per permetterle di produrre i suoi stessi brani.
Si è trasferita con la sua famiglia a Hyannis, sempre nel Massachusetts, e ha frequentato la Nauset Regional High School, un liceo a Cape Cod, dove ha suonato la tromba e cantato nella jazz band, prendendo anche lezioni di chitarra.
Inoltre, per quattro anni, Meghan Trainor ha suonato la chitarra, le tastiere e cantato con una band locale chiamata Nantucket Island Fusion.
Meghan Trainor è una cantante cicciottella, non esattamente bellissima, che esorta le ragazze normali a non farsi problemi del loro fisico.E' anche una produttrice di dischi. la sua "All about that bass" sta ricevendo un enorme gradimento:
Because you know I'm all about that bass
'Bout that bass, no treble
I'm all 'bout that bass, 'bout that bass, no treble
I'm all 'bout that bass, 'bout that bass, no treble
I'm all 'bout that bass, 'bout that bass
Yeah it's pretty clear, I ain't no size two
But I can shake it, shake it like I'm supposed to do
'Cause I got that boom boom that all the boys chase
All the right junk in all the right places
I see the magazines working that Photoshop
We know that shit ain't real
Come on now, make it stop
If you got beauty beauty just raise 'em up
'Cause every inch of you is perfect
From the bottom to the top
Yeah, my momma she told me don't worry about your size
She says, boys they like a little more booty to hold at night
You know I won't be no stick-figure, silicone Barbie doll
So, if that's what's you're into
Then go ahead and move along
Because you know I'm all about that bass
'Bout that bass, no treble
I'm all 'bout that bass, 'bout that bass, no treble
I'm all 'bout that bass, 'bout that bass, no treble
I'm all 'bout that bass, 'bout that bass
I'm bringing booty back
Go ahead and tell them skinny bitches hey
No, I'm just playing I know you think you're fat
But I'm here to tell you,
Every inch of you is perfect from the bottom to the top
Yeah, my momma she told me don't worry about your size
She says, boys they like a little more booty to hold at night
You know I won't be no stick-figure, silicone Barbie doll
So, if that's what's you're into
Then go ahead and move along
Because you know I'm all about that bass
'Bout that bass, no treble
I'm all 'bout that bass, 'bout that bass, no treble
I'm all 'bout that bass, 'bout that bass, no treble
I'm all 'bout that bass, 'bout that bass
Because you know I'm all about that bass,
'Bout that bass, no treble
I'm all 'bout that bass, 'bout that bass, no treble
I'm all 'bout that bass, 'bout that bass, no treble
I'm all 'bout that bass, 'bout that bass
Because you know I'm all about that bass,
'Bout that bass, no treble
I'm all 'bout that bass, 'bout that bass, no treble
I'm all 'bout that bass, 'bout that bass, no treble
I'm all 'bout that bass, 'bout that bass
