Think you already know everything about 2011's top 10 Billboard Hot 100 singles?
In this special countdown of the year's top 10 songs, we reveal exclusive chart facts and trivia found no where else on Billboard.com. Like: how common is it for pop duos to rank highly on the year-end chart? Or, when was the last time Maroon 5 or Christina Aguilera had such a banner year?
Produced for our new weekly show TMI: the Music Insider, join host Downtown Julie Brown and Billboard's associate director of charts/retail Keith Caulfield as they recap 2011's biggest tunes.