Watch out, Justin Bieber: Lindsay Lohan is not happy with you. In a quickly-deleted Instagram rant yesterday, Bieber noted that no one should be comparing him to LiLo, since at least he has lots of money. (He ended up re-writing and re-posting the tirade, sans LiLo comment.) Needless to say, Lohan took issue with that, sources tell TMZ. She was "appalled" at the "senseless and mean" comments, and has no idea why Bieber picked a fight with her, but is certain "karma" will come back to haunt him, they say. As TMZ puts it, LiLo considers Bieber a "rude, ungrateful, obnoxious little hairless boy." In other bad news for the Biebs, his hamster died.