Britney in rehab, again, left again, back in again

NEW YORK -

Britney Spears entered rehab Tuesday after a bizarre weekend that included shaving her head and getting a new tattoo.

Spears' manager, Larry Rudolph, told People magazine's Web site that Spears, 25, had voluntarily checked herself into an undisclosed treatment facility.

"We ask that the media respect her privacy as well as those of her family and friends at this time," Rudolph was quoted as saying.