Michael Jackson marked a personal milestone Friday: his 50th birthday.

The 13-time Grammy winner, who has sold more than 750 million albums, told ABC News' "Good Morning America" that he's "looking forward to doing a lot of great things. ... I think the best is yet to come in my true humble opinion."

Jackson talked to ABC by phone Thursday.

"People see some of the things I do and they say, `Why don't you show this to the world? People don't know you do these things.' And maybe I will," he said.

Jackson said recording the blockbuster albums "Thriller" and "Off the Wall" were the happiest times of his life.

"That meant very much to me and seemed to be received so beautifully by the public and the world. You know, I enjoyed it very much," he said.

As for his birthday plans, "I'll just have a little cake with my children and we'll probably watch some cartoons," he said.

Jackson, a twice-divorced father of three, said he aims to provide a normal life for his children.

"I am letting them enjoy their childhood as much as possible. ... I let them go to the arcade and go to the movies and do things. I think that comes naturally. I want them to get to do things I didn't get to do," he said.

"I get pretty emotional when I see them having a wonderful time," he said.

Jackson was asked if he had received a membership card from AARP, which focuses on the needs and concerns of those 50 and older.

"Not that I know of!" he said, laughing.

(AP August 30, 2008)