Overalls don't seem to be a go to garment for most fashionistas. It is not seen as trendy whatsoever. The beautiful thing about fashion that is resounding is that it's all about how YOU wear. Not what's on the runway and who should tell you what's hot. This is how we have trendsetters in the world.
Here this UK citizen is shown wearing her slouchily overalls with the flap on her waist. This simple modification shows that she pays attention to details. This may not be an option for some, but who's to say that other then you right?