Despite a terrible photo of her ass looking huge a few months ago, Janet Jackson appears to be maintaining her thinness. She had a tiny waist at the premiere of ‘Why Did I Get Married’ in October 2007 and looked similarly slender at the NAACP Image Awards this month, February 2008.

Over the years, Janet’s weight has gone up and down. She credits diet and exercise for helping her lose weight, but about a decade ago, a story surfaced where Janet and her ex-husband, Rene Elizondo, had been getting prescription medicine in the name of their personal chef. One of the prescriptions was for the diet drug, Phentermine. Read more about Phentermine here. It is chemically related to amphetamine (aka speed!) and acts on the brain to suppress appetite.