Ooops...she did it again.

Celebrity newsmagazine "Entertainment Tonight" reported that singer Britney Spears checked out of Promises residential treatment center in Malibu, Calif. early Wednesday morning. That is less than 24 hours after she checked into the facility.

The TV show "Extra" reported that Spears attempted to get a tattoo before going home but the tattoo parlor was closed.

After it was reported that she was in rehab, a spokesperson for Spears released a statement Tuesday evening, saying, "Britney Spears has voluntarily checked herself into an undisclosed rehab facility today. We ask that the media respect her privacy as well as those of her family and friends at this time."

Promises is the second treatment center Spears has reportedly checked in and out of in recent days.

Last week, Spears checked into a rehab facility in Antigua, but left after one day.

She returned to California on Friday, where she embarked on her now-infamous hair shaving incident.

Previous Stories:

• February 20, 2007: Report: Spears Returns To Rehab
• February 19, 2007: Sellers Claim To Have Now-Bald Britney's Hair
• February 19, 2007: Britney Spears Shaves Head, Gets Tattoos