Pop and Hip-Hop ruled the roost in 2009 and songs by artists like Beyonce , Black Eyed Peas , Lady Gaga and Taylor Swift topped the charts. Whether you like these songs or not , they were playing all over the place. Rock lovers were not disappointed though with a few bands churning out some astounding music. U2 released ‘No line on the Horizon’ , Pearl Jam released ‘Backspacer’ and Greenday treated their fans to ‘ ..