Troubled pop tart Britney Spears was in yet another traffic incident yesterday when she ran her 2008 Mercedes into a car in front of her in stalled traffic on a Los Angeles freeway. That car, in turn, hit the one in front of it. No one was injured and no damage was reported. Spears has been involved in a spate of traffic incidents, from driving with her son on her lap to a hit-and-run in a parking lot. (More Britney Spears stories.)