From PEOPLE Magazine Click to enlarge
ATTACK
FEB. 21 Spears lost her cool with the constant media attention and walloped a photographer's car with an umbrella.

SNOOZE ALERT
DEC. 31, 2006 Foreshadowing her meltdown, Spears hosted a New Year's Eve Party at Las Vegas's Pure nightclub but fell asleep during the festivities.

BALD!
Feb. 16 The buzz cut heard 'round the world: Spears calmly shaved her own head at a Tarzana, Calif., salon.

SPLASH DOWN
JULY 18 The singer pulled off the highway for a skivvies-only dip in the Pacific.

STAGE FRIGHT
SEPT. 9 A much-anticipated return to the stage at the MTV Video Music Awards in Las Vegas turned into a debacle when Spears became rattled by hair and wardrobe snafus.

EX FACTOR
OCT. 1 An outing with sons Jayden (left), 1, and Preston, 2, was overshadowed by the day's events: Spears temporarily lost custody of the pair to ex Kevin Federline after failing to comply with a judge's orders, including submitting to drug and alcohol tests and showing proof that she was a licensed California driver.

DRESS UP
OCT. 31 A day after her album Blackout was released, an eclectically costumed Spears celebrated Halloween in Hollywood.

PARTY GIRL
DEC. 1 Celebrating turning 26 a day early, Spears partied at a Bel Air event with pals like Paris Hilton. The next day she shared two Cold Stone Creamery ice cream cakes at home in Beverly Hills with her sons.

OTHER CELEB MELTDOWNS

PARIS HILTON
The 26-year-old hotel heiress landed in jail after violating probation by driving with a suspended license following a DUI arrest last year. After a false-alarm reprieve, she eventually served her time in a 12-by-15-ft. cell at the Century Regional Detention Facility in Lynwood, Calif. She vowed to make a difference upon her release. "I've really grown and matured," she said.

LINDSAY LOHAN
In July, Lohan was arrested for her second DUI, driving with a suspended license and cocaine possession—11 days after finishing a stint at Promises rehab clinic. The relapse landed her a third trip to rehab. On Nov. 15, Lohan, 21, served just 84 minutes in jail due to overcrowding. "Lindsay has been given a new start," said her mom, Dina.

OWEN WILSON
On Aug. 26, the actor—who has struggled with drug addiction and depression—made an apparent suicide attempt. Since then, he's mostly been hanging out with brothers Luke and Andrew, best pal Woody Harrelson and a series of women, including American model Le Call, 28, with whom the Wedding Crashers star celebrated his 39th birthday in Maui in November.

AMY WINEHOUSE
The 24-year-old British singer canceled tour dates, slurred her songs onstage and was photographed bloodied and bruised on the streets of London. Then on Dec. 18, Winehouse—who has admitted to struggling with drugs—was arrested and released on suspicion of interfering with a criminal case against her husband, Blake Fielder-Civil, who's been accused of assaulting a bartender.