Britney Lands 5th Pop Songs No.1 Five Years Ago

Five years ago today, Britney received her 5th Pop Songs number one for… Circus!

Can you believe that was half a decade ago already?!

Billboard Tweeted the news (our girl ReTweeted it):

To celebrate, Brit Brit posted a handful of #Circus tour photos on her Instagram, including this one:

The good ol’ days!