Oprah Can't Drop the Deuce

It's possibly a lil' TMI, but Oprah Winfrey says she's back to 200 lbs. and she's "mad" at herself for letting it all go to ... her waistline.

"I'm embarrassed," says O, in the new issue of her mag. "I can't believe that after all these years, all the things I know how to do, I'm still talking about my weight ... 'How did I let this happen again?'" Apparently since slimming down to 160 in '06, she's put on 40 big ones.