On August 20, 1999, Britney was performing in Adrian, MI for her ...Baby One More Time Tour
On August 20, 2002, she was seen shopping in Beverly Hills
On August 20, 2003, she was seen out and about in Los Angeles
On August 20, 2004, Mrs. Federline was seen in Hollywood
On August 20, 2006, she appeared at the Teen Choice Awards to introduce Kevin Federline's debut performance.
On August 20, 2008 she was seen at a playdate with her kids and Gwen Stefani's son Kingston in Los Angeles
She was also seen with Teresa LaBarbera and Lynne at Conway Studios in Hollywood
On August 20, 2009, Britney was performing in Hamilton, Canada during her Circus Tour
On August 20, 2011, Britney took her Femme Fatale Tour to Columbus, OH.
On August 20, 2014, she was performing in Las Vegas during her Britney: Piece of Me residency.
On August 20, 2015, she appeared at the Back-To-School charity event for The Nevada Childhood Cancer Foundation
She also shared this picture on Instagram captioned "The mermaid life 🐠"
On August 20, 2016, she was performing in Las Vegas her revamped Britney: Piece of Me show.
On August 20, 2018, she performed in Dublin during her Piece of Me Tour
And finally, on August 20, 2020, she shared yet another picture of her now iconic Project Rose photoshoot