UNITED STATE OF POP 2009, reworked for vertical screens! These were the 25 biggest songs in the U.S. in 2009 in one mashup! To everyone who’s enjoyed these mashups over the years — THANK YOU ALL! Your support means so much to me! It's been a lot of fun making these, and there’s definitely a lot more music still to come from DJ EARWORM! Featuring: The Black Eyed Peas - BOOM BOOM POW Lady Gaga - POKER FACE Lady Gaga Featuring Colby O'Donis - JUST DANCE The Black Eyed Peas - I GOTTA FEELING Taylor