Why are Miley Cyrus jokes okay and Kelly Clarkson fat jokes off limits?

Kelly Clarkson doesnt care what people say about her. She is very down to earth and cares so much about her fans so of course theyre going to stick up for her. She has worked extremely hard to get where she's at and shes had a hard life which unless you really liked her you wouldnt know about. That's why everyone is so defensive of her. + the main reason.. She really isnt fat.....