Alternatively make it look like the glitter is supposed to be there. Tell yer that's just how you roll now, you discovered your inner four year old.

Shouldn't be too hard for you to be convincing about it. [Because the actually serious advice of "find a good explanation why it would be there and change it from the looks of an accident to those of purposefulness" has to be covered up by an insult, or it's unable to cross her lips. Something like that.]