The smile reads "happy to be here, honestly," but the eyes say "please take this corset off, I can't breathe properly and it's not even a good look for me."
Also: that smile, seen previously.
From the accompanying editorial, with Nicki done pretending she likes this look:
And a less constricting look, which she's much happier with.
It could have definitely been worse though.
She could have ended up a Smurf-esque shade of blue thanks to post-production hijinks, like she did that one time in some other major fashion magazine.