Michael Jackson's dermatologist Dr. Arnold Klein responds to rumors about the paternity of Jackson's children and drug allegations.

Dr. Klein reveals during an interview on "Good Morning America" that Jackson seemed strong and in good health just three days before his death.

"He was not in terrible pain when I saw him," Klein says "He danced in the office. He danced for my patients. He was very muscular and he was very, very happy and dancing."

"I saw nothing at that point and time that would make me worry whatsoever," he added. "I always was concerned about him, because I was always worried about other doctors. No matter what he wanted, someone would give it to him...the very rich and the very poor and the very famous all get the worst medical care." He made sure to point out that he did not know specifics about what Michael may have been taking, nor is he under investigation.

"I'm not one of the five doctors [being investigated]," he said. "I've not been contacted by the police in Los Angeles."

As to reports that he is the father of Jackson's two eldest children, he says, "Not to the best of my knowledge. All I can tell you is that to the best of my knowledge, I'm not the father of these children."