In honour of Britney Spears' 39th birthday, we've created a little lyrical quiz.
Britney burst out onto the scene in 1998 with a certain chart-topping hit called '...Baby One More Time'.
Fast forward 20 years later and it's gone down in history of one of the most recognisable songs ever released.
The singer has had a roller-coaster of a life since the 90's; from dating Justin Timberlake; to having that brief meltdown in 2007; to rising back from the ashes and taking up a residency in Las Vegas, which earned the singer upwards of $80 dollars.
Try our lyrical quiz below to see if you know your 'Womanizer' from your 'Piece of Me'.