In Adeles case, me and many others class her as a chav because of the way she is acting in public especially recently. I could think of a lot stronger words then chav to use for her but chav is about right here.
There is a diffferent betwen acting the ass which many pop stars do to acting the chav. In fact I dont ever recall Gaga or rhianna (2 artists who you would expect it from) act the way adele has done recently. 2 awards show plus photos all within a week, that a lot of "chaving".
People use the excuse its because she is from London and that how it is but thats crap, my husband is an eastender and would never act like that in public and in fact those fans who use this as an excuse is really a dis on the good folk of London.
My guess is its a sign its all getting too much for her, the success appears to have gone to her head and she does this maybe to let of steam. Selling the number of albums she has plus all the public exposure in such a short space of time is serious pressure, some artists can handle it, others dont.
Its sure gonna be an interesting next 2 years for adele to see just what side of the fence she is gonna fall on. But she really needs to control herself in public a bit more, what I find confusing is where on earth are her management and advisers and why are they letting her continue like this unchecked.