Britney Spears' manager denied reports that the pop star passed out in a Las Vegas nightclub shortly after leading the New Year's Eve countdown, saying she just fell asleep.

"By about 1 o'clock, she was just done, so we took her out," Spears' manager, Larry Rudolph, told The Associated Press Monday. "She was not drunk. She was just tired and falling asleep."

Spears, 25, was hired to host the festivities at Caesars Palace's Pure nightclub.

But a Pure source told the Las Vegas Review Journal the bubbly star had been knocking back pineapple rum cocktails with champagne when she collapsed shortly after midnight, and that she had to be helped back to her hotel room by bodyguards.

"She had a little too much to drink," a Pure source told the Review Journal. "She was assisted out, but she was not carried."

Click here to read the New York Post report and see a photo of Spears partying on New Year's Eve

Click here to read the New York Daily News report and see more photos

Witnesses said Spears was talking with one of her male dancers on a tented cabana bed when she said she wanted to leave, stood up and "she went into a dead faint and just fell right to the floor," a source said.

The source said the group pulled her onto the bed and called security to "get her out as quickly as possible."

"It appeared as if she was being dragged as she wasn't walking under her own speed," one eyewitness was quoted as saying on celebrity gossip blogger Perez Hilton's Web site.

One woman in Spears' entourage yelled, "Make sure nobody gets any photos. No photos anywhere."

Rudolph said Spears walked out of the club and did not seek medical attention.

"There is nothing out of the ordinary here," he said.

Spears was traveling with her two sons, 3-month-old Jayden James and 1-year-old Sean Preston. She filed for divorce in November from her husband of two years, Kevin Federline.

In a statement on her Web site posted earlier this month, Spears noted that in recent nights out — one in which she flashed her apparent lack of underwear to the paparazzi — she may have taken her "new found freedom a little too far."

The New York Post's Cynthia R. Fagen contributed to this report.

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