Personally, I would have a hard time taking anyone seriously who wears their panties outside of their jeans (i.e. "Slave" video).
Two possibilities here for this unusual fashion statement:
1. You're stupid and can't dress yourself.
2. You're trying to be sexually forward.
I don't think it's #1, because despite any misgivings I may have about her musical talent, or lack thereof, I wouldn't go so far as to say that she's mentally incompetent. Not likely to be a rocket scientist, but not brain dead either.
Which leaves #2. Showing your bright pink thong underwear in public, much less putting them on top of your little jeans is just a little too much. I can just picture our old chapter advisor (picture little old lady with poofy hair) wagging her finger and talking about "Conduct Unbecoming of an Alpha Xi Delta!"