Whitney Houston is back in rehab for the second time in a year, her publicist confirms. The news comes just a month after Bobby Brown's troubled wife was rushed to a hospital in Paris after suffering from, um, "food poisoning" on a flight bound for France. And in January, she was cited by Atlanta police after rear-ending a bus with her SUV. In between calamities, Houston had been working on a comeback album with superproducer Clive Davis. I'll assume that's on hold for the moment.