The revelation comes amid the singer's 42-date "Piece of Me" tour which began in July and is slated to finish in October.
For years, Spears’ personal and legal issues have been covered in the press, including a notable 2007 breakdown.
Read on for a look at some of her memorable moments before and after that episode.
Vegas residency, Dec. 2013 - Dec. 2017
Spears’ Vegas residency show, “Britney: Piece of Me,” ran from Dec. 2013 until Dec. 2017, with a total of 248 shows that grossed $137.7 million, according to Billboard.
During this time, Spears also released two albums: 2013's "Britney Jean" and the 2016 album, "Glory." She also appeared on "The X Factor" as a judge in 2012.
Michael Jackson Video Vanguard award, August 2011
Spears was presented with the honor at the 2011 MTV Video Music Awards.
“Femme Fatale,” March 2011
Spears released another album, “Femme Fatale,” which included the songs “Till The World Ends” and “Hold It Against Me,” among others.
“Womanizer,” October 2008
Spears’ single “Womanizer” came out on Oct. 3, 2008 and reached #1 on the Billboard Hot 100 on Oct. 25, 2008.
The track was featured on her November 2008 album, “Circus.”
VMA wins, September 2008
Spears’ video for “Piece of Me,” one of the songs off "Blackout," was named Video of the Year at the 2008 VMA ceremony. The singer also received Best Female Video and Best Pop Video for the tune.
“It's a cool video, but I think, by far, I've done videos that are way better, so I was really shocked that it got the award,” she later reportedly told radio station Z100 at the time,
Custody deal, July 2008
A deal with ex-husband Kevin Federline gave Spears increased visitation rights, People reported.
The former couple got a 50-50 custody on their children, Us Weekly reported in March.
“How I Met Your Mother” cameo, March 2008
Spears played a small role in an episode of the CBS sitcom "How I Met Your Mother." The episode racked up 10.7 million viewers the night it aired, People reported.
Health, conservatorship and custody issues, 2008
Spears was under a court-supervised conservatorship starting February 2008, with her father Jamie and another co-conservator, Andrew Wallet, having control over numerous aspects of her personal life.
The move came after two involuntary psychiatric holds for the singer in January 2008, the first of which reportedly happened after Spears refused to hand over son Jayden to Federline.
Spears challenged the conservatorship but it was upheld, E! reported.
In July 2008, Spears agreed to give Federline full custody of the couple’s children following a public meltdown.
"Kevin was not [out] to get custody. Kevin's goal was to set up some kind of template so the mother of his children can co-parent," Federline's attorney, Mark Vincent Kaplan, told MTV. "He said, 'I need to have Britney involved in the co-parenting of the kids, but I need there to be a structure.'"
VMA performance, September 2007
Spears was widely mocked for her performance of “Gimme More” at the 2007 MTV Video Music Awards. Some criticized the singer's sparkly two-piece outfit, while others bashed the star for "freezing" and appearing to be out of it on stage.
The song was later included on her album “Blackout,” which came out in October 2007.
Meltdown, February 2007
Spears went through a very public meltdown in February 2007 before she and Federline divorced later that year.
According to E!, the “Toxic” singer briefly was at a Caribbean rehab facility, before later shaving her head at a California hair salon.
She also went to a Malibu rehab for a day-long stint, before she returned a few days later for a month-long stay, per the report.
Kevin Federline marriage, October 2004
Spears tied the knot with backup dancer Federline in 2004.
The couple's first son, Sean Preston, was born roughly a year later — on Sept. 14, 2005. A second child, Jayden James, was born on Sept. 12, 2006.
The marriage didn’t last long: Spears filed for divorce in November 2006.
Jason Alexander marriage, January 2004
Spears was already a pop star and sex symbol — with several hit albums and MTV Video Music Awards performances to her name — when she married Jason Alexander, a friend who hailed from her hometown of Kentwood, La. The union, however, was annulled after just 55 hours.
The Associated Press contributed to this report.