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Chief Keef -- the 17-year-old rap sensation -- was arrested in DeKalb County, Georgia yesterday for disorderly conduct ... TMZ has learned.

The details surrounding the arrest are unclear.

According to the booking sheet, Keef -- real name Keith Cozart -- was listed at 5'9" and 160 lbs.

After the arrest,

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Arnold Schwarzenegger and Maria Shriver are in no rush to get divorced ... and there are 2 lines of speculation -- either they're so rich it doesn't matter, or they may actually get back together.

Several sources connected to the former couple tell TMZ ... neither Arnold nor Maria feel any urgency to get

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Lindsay Lohan has just been sued for $5 million she doesn't have ... all because of her highly-publicized drug problems, TMZ has learned.

D.N.A.M. Apparel Industries -- a clothing manufacturer -- just filed the countersuit against Lindsay in response to Lindsay's lawsuitagainst the

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Kathie Lee Gifford says there will be a "revolt" at NBC if the powers that be allow Matt Lauer to leave the "Today" show, telling TMZ ... she'll do whatever it takes to keep him around.

Kathie Lee was leaving Rockefeller Center in NYC Monday morning when she made it clear -- she