For the second time in a week, Britney Spears [ tickets ] reportedly has left a rehab facility less than 24 hours after checking herself in.

Entertainment Tonight reports that Spears left the Promises residential treatment center in Malibu, CA, this morning (2/21).

Last week, Spears reportedly checked herself into Eric Clapton’s Croassroads Centre in Antigua, but left the following day. The 25-year-old singer subsequently made headlines Friday (2/16) when she shaved her head bald and got two new tattoos; later in the weekend, she was spotted club-hopping while wearing a blonde wig.

Sheryl Crow [ tickets ] will team up with environmental activist Laurie David for this spring's "Stop Global Warming College Tour," an outing that will aim to "motivate college students to become part of the movement to stop global warming and demand solutions from themselves, their schools and their country," according to a press release.

The tour is scheduled to launch April 9 in Dallas, and subsequent stops are planned in College Station, TX; Baton Rouge, LA; New Orleans; Birmingham, AL; Auburn, AL; Gainesville, FL; Atlanta; Charlottesville, VA; Nashville, TN; Chapel Hill, NC; College Park, MD; and Washington, DC. Each stop will feature a 90-minute presentation what will include remarks by David, a short performance by Crow, clips from former Vice President Al Gore's global-warming documentary, "An Inconvenient Truth," prerecorded video clips from various comedians and a dialogue with student attendees. More information is available at StopGlobalWarming.org.

Prince [ tickets ], who late last year began an ongoing run of weekly Friday- and Saturday-night performances at Las Vegas' Rio Hotel & Casino, may soon pull the plug on that gig, according to Las Vegas' KVBC-TV; the channel's entertainment reporter, Alicia Jacobs, told viewers that the legendary performer will cut ties with the venue March 31, and will turn his attention to a tour in support of his latest album.

Despite the report, a spokesperson for the Rio venue--dubbed 3121, the title of Prince's most recent studio release--told the Las Vegas Review Journal that "there's not a confirmed end date as of yet."

Rapper Busta Rhymes [ tickets ]--real name Trevor Smith--is considering a plea deal that would allow him to remain free if he pleads guilty to charges stemming from a pair of alleged assaults that took place last year, according to published reports. The first incident occurred last August, and resulted in Smith being charged with assaulting a fan who allegedly spit on Rhymes' car; the other took place in December, when Smith allegedly assaulted his former driver.

Manhattan Criminal Court Judge Tanya Kennedy has told Smith he could receive a "conditional discharge" if he pleads guilty to third-degree assault, according to Newsday.