In 2009, six acts achieved their first U.S. number-one single either as a lead artist or a featured guest: Lady Gaga, Colby O'Donis The Black Eyed Peas, Jay Sean, Jason DeRulo, and Owl City.
В 2009 году шесть исполнителей впервые возглавляли главный чарт США: Lady Gaga, Colby O'Donis Black Eyed Peas, Jay Sean, Jason DeRulo, и Owl City.