Supergirl’s panties
Actually Batgirl has a point here, Supergirl really does wear tiny itsy weeny skirts so she must be showing off her panties all the time (Maybe it’s some kind of power? Flash her panties and the villains forget what they are doing? :D), Maybe she should forget about wearing boring functional knickers and think about getting something seriously sexy from STRICTLY LINGERIE instead. When the inevitable upskirt occurs then at least she’ll be flashing something interesting!