Amanda Bynes just tweeted something the cops clearly aren't buying -- she says she's drug free.
Amanda says, "I only smoke tobacco. I don't drink or do drugs." She adds, "I've never had a bong in my life!"
As you know, Amanda has been accused of smoking pot in her apartment and then throwing a bong out the window after police entered.
And there's more. Amanda says, "I need to get another nose job after seeing my mugshot!"
That seems to be the least of her problems.