Pop amps up, the Tea Party ramps up, and the Great Recession spawns the most epic Dance boom since ’70s Disco starring Gaga, Taio, Usher… and Auto-Tune! Eminem is back big, and will.i.am’s “bubble” philosophy permeates the charts and even wins over critics, many of whom get political on the eve of social media’s gatekeeper-busting democratization of pop culture.

#1 Song of the Year   The top song according to our Chartcrush ranking of all Hot100 songs that earned the majority of their chart ranking points in the year

Artists of the Year   The top three artists based on all charted songs during the calendar year

1. Usher
2. Ke$ha
3. Lady Gaga

Artist with Most Charting Songs   Artist(s) with the most Hot100 charting songs during the year (song count in parentheses)

• Glee Cast (80)

Average #1 Artist Age   The average of how old artists who scored #1 Hot100 hits during the year were when their songs first reached #1

• 27.8 years

#1 Songs   List of Hot100 #1 songs that earned the majority of their chart ranking points in the year, and (in parentheses), the month the song first hit #1 and the total number of weeks it was #1

1. Jay-Z feat. Alicia Keys – Empire State of Mind (November ’09, 5 wks)
2. Ke$ha – TiK ToK (January, 9 wks)
3. Black Eyed Peas – Imma Be (March, 2 wks)
4. Taio Cruz feat. Ludacris – Break Your Heart (March, 1 wk)
5. Rihanna – Rude Boy (March, 5 wks)
6. B.o.B feat. Bruno Mars – Nothin’ on You (May, 2 wks)
7. Usher feat. will.i.am – OMG (May, 4 wks)
8. Eminem – Not Afraid (May, 1 wk)
9. Katy Perry feat. Snoop Dogg – California Gurls (June, 6 wks)
10. Eminem feat. Rihanna – Love the Way You Lie (July, 7 wks)
11. Katy Perry – Teenage Dream (September, 2 wks)
12. Far*East Movement feat. Cataracs & Dev – Like a G6 (October, 3 wks)
13. Rihanna – Only Girl (In the World) (December, 1 wk)