Which other pop stars, rappers and rock 'n' rollers made the list?
Beyonce broke out as a solo artist in 2003, to even bigger acclaim than her 1990s girl group Destiny's Child. She's proved herself "Irreplaceable" in at the top of the charts in urban and pop music, continuing to meld the two, as she caught everyone's eye as a fashion icon, stage entertainer, dancer and music video star. "Single Ladies" alone will likely be forever imprinted on the minds of web surfers from this decade.
Photo: Beyonce breaks out in 2003.