Congratulations are in order for Taylor Swift! She now joins the likes of Katy Perry and Justin Bieber in the Billion Club. That’s right, with a “B” -- the video for “Blank Space” has hit more than one billion views on YouTube. At 7 months, it also holds the lofty distinction of being the fastest video to reach a billion views — Justin’s “Baby” took 3 years and Katy waited 2 years for her “Roar” to reach that status.

We've probably all seen Taylor’s gorgeous and hilarious (gorg-larious?) video more than once, but how closely have you actually been watching?

Brush up on your "Blank Space" below, but don't watch before you take the quiz! Taylor doesn't like cheating...