Everyone seems shocked that Madonna is turning 50 this year. Fifty! And she looks so good! Well, duh. She's a bazillionaire. Recording and touring are gruelling affairs, but it's not like she's been carrying 50-pound sacks of rice on her back in the blazing hot sun all of her life. During an interview last night, Cynthia McFadden even compared her to geezer rockers Mick Jagger and David Bowie. (She meant it in a good way, but still. Cynthia.) But it seems the focus is -- for the moment -- turning away from the relentless march of time and toward Madonna's Malawi documentary, I Am Because We Are.