Dr. Arnold Klein, Michael Jackson's longtime dermatologist and friend, spoke briefly to celebrity news photographers outside his home this morning.

Klein has been the subject of some rumors about Jackson - namely that he may have administered medical treatment to the star in the recent past.

There is also a report that Arnold Klein is the biological father of MJ's kids Prince, 12, and Paris, 11. Us Weekly made that claim earlier this week.

Debbie Rowe, the mother (also disputed), was his former nurse.

The LAPD wants to speak with him about drugs and Michael. Asked about the allegations, he said, "There are no allegations about me. I guarantee it."