If you don't listen to the radio, you probably have no idea who we're talking about. So let us enlighten you about the new girl on the Billboard Hot 100 Chart.

Carly Rae Jepsen's "Call Me Maybe," has become a viral hit, officially knocking Gotye's "Somebody That I Used to Know" off the number one spot on the Billboard Hot 100 chart.

The "Call Me Maybe" phenomenon began in February, when Justin Bieber and his girlfriend Selena Gomez, and a couple of their famous friends recorded a lip-sync video to Jepsen's pop song. Thanks to Bieber and Gomez endorsing the tune on YouTube and on their their Twitter accounts, the bubblegummy song became an overnight internet sensation.

In fact, Jepsen's single is No. 1 while Bieber's single "Boyfriend" is keeping calm at No. 10. So just how did Jepsen get to the top of the Billboard Hot 100? Check out this timeline by HuffPost to see 26-year old Jepsen's journey to the top.

To be brutally honest, it IS a very catchy tune:



And here's Justin Bieber's video of Jepsen's song: