..which I really hope someday becomes a page on TV Tropes, and I become the Trope Namer. Anyway:
Panel from Star Wars #13 (February 2016), script by Jason Aaron, pencils and inks by Mike Deodato, colors by Frank Martin Jr., letters by Chris Eliopoulos
But hey, wait a minute, Doctor Aphra! Are you really wearin' a crop top befitting your position as Darth Vader's chauffeur and general all-around gopher? Let's turn a few pages and look at a couple more panels:
So, I'm guessing the first panel was just a coloring mistake instead of Aphra flaunting her Force-toned abs. Still: skin-tight t-shirts of the Star Wars Universe.