JESSICA SIMPSON’S mother Tina has filed for divorce from Jessica's dad Joe.

Tina filed the papers in Texas last month, claiming, "The marriage has become insupportable because of discord or conflict of personalities."

Tina and Joe were married in 1978.

In the county where Tina filed, there are specific rules about how divorcing spouses have to behave toward each other during proceedings -- they can't curse at each other, harass each other over the phone, or physically attack each other ... basically they HAVE to act like civilized adults.

DIDDY was involved in a serious car accident in L.A.

Law enforcement sources tell TMZ, a car turned left in front of Diddy's SUV and Diddy's driver t-boned the other vehicle.

Officers were called to the scene -- and cops claim everyone involved in the accident complained of pain, including Diddy, his driver, and the other driver.

It's unclear how seriously anyone was injured -- but no one was transported to a hospital.

American Idol season 11 winner PHILLIP PHILLIPS kicked off the World Series last night in San Fran as the Giants faced the Detroit Tigers.

Phillips handled it like a pro, and gave a very sweet rendition of the National Anthem.

During TAYLOR SWIFT’S most recent appearance on ELLEN DEGENERES (which will be airing today!!!!), they played a little game involving Taylor’s exes (and rumored exes). Taylor got more than a little uncomfortable with giant pictures of herself with the likes of TAYLOR LAUTNER, JOHN MAYER, JOE JONAS and CORY MONTEITH.

Taylor explained she didn't want to explicitly reveal who her songs were written about because it's "the one shred of dignity" she has left.