Sideshow: Brangelina twins have arrived. Or haven't

Guess that wasn't the North Star shining above

Brangelina

's villa in France's Provence region.

Or was it?

The media were at war with themselves yesterday with contradictory reports about the most significant human birth since the last celeb baby, Brangelina's twins.

TV's

Entertainment Tonight

cites an anon "source close to [

Angelina

]

Jolie

" who says

Isla Marcheline

and

Amelie Jane Jolie-Pitt

were delivered into the world by C-section at a Catholic clinic in Aix-en-Provence earlier this week.

People mag says it's all baloney.

"Angelina has not given birth," the mag quotes Jolie's rep as saying. Jolie and hubby

Brad Pitt

, who already have four kids -

Maddox

, 6,

Pax

, 4,

Zahara

, 3, and

Shiloh

, 2 - had earlier said the twins were due in August.

Kristin Davis

says she's nothing like her

Sex and the City

character, Charlotte York, obsessed with getting married.

"When I was young, I thought, I never want to get married, because I lived in the South, and that was all anybody talked about," the South Carolina native said Thursday at an AIDS benefit in Lalaland. "All I wanted to do was come to New York and do theater. I did not want to be relying on some man!"

Authorities yesterday ruled suspicious a fire that gutted a Long Island house owned by rapper and actor

50 Cent

(

Curtis Jackson

).

Six people were sent to the hospital, including Fiddy's ex-gf

Shaniqua Tompkins

and their 10-year-old son,

Marquise

. Fiddy, who doesn't live in the house, was on a movie location in Louisiana at the time.

The $2.4 mil house has been the subject of a bitter dispute between the rapper and Tompkins, who contends that Fiddy promised he'd give her the house a decade ago.

In a lawsuit she filed earlier this year, Tompkins says that, since their breakup, Fiddy has tried to evict her.

Tompkins contended Fiddy was responsible for the fire. "I know Curtis Jackson did this," she insisted to reporters. A rep for the rapper did not immediately comment.

L.A. Superior Court Commissioner

Reva Goetz

yesterday ruled that

Britney Spears

was still "not fit" to participate in her power-of-attorney case, which is due to go to trial July 31. He said he might order the 26-year-old, who was forcibly hospitalized for psychiatric evaluation in February, to undergo further psych tests. Brit remains under the conservatorship of her father,

James Spears

.

Even as the German newspaper Bild contends that she wore a diaper under her dress during a recent visit to her jailed hub,

Blake Fielder-Civil

, there's news that

Amy Winehouse

has been invited to sing for heads of state and other dignitaries at

Nelson Mandela

's birthday concert June 27 in London. Guests will include

Oprah Winfrey

and former President

Bill Clinton

.

Will Amy remember to turn up?

The show, which benefits Mandela's AIDS charity, will feature

Queen

,

Simple Minds

,

Leona Lewis

and the

Soweto Gospel Choir

. Mandela turns 90 on July 18.