It's just because she's not known for her personal life, she's not like a "celebrity;" instead she is an amazing singer/musician. Who needs rehab/sex headlines when you get Grammys?
I never was a huge stan but I always liked her music I would consider myself as a big fan. I have all of her albums and I really like her music & personality. and she's not irrelevant.
Kelly remains This is why I have stanned hard for her since her Idol days (Even though she annoyed me early on in the first season). She really is genuine.
Kelly's one of the only pop stars who would laugh and tweet about something like this. All the others ones have such massive egos they would probably cry for days over a comment like that. It's amazing how Kelly has literally not changed at all from day 1 of her fame.