Grab your popcorn — the fourth installment of MTV's best train-wreck show is premiering tonight at 10 pm. If I was forced to guess, I would say that this season will be a cross between MTB2, when Diddy formed the disastrous "Da Band," and MTB3, when Diddy formed the only slightly less disastrous Danity Kane. Even if it's horrible, I will at least watch until the moment Laurie Ann goes crazy, and Diddy threatens her with a chair.