By Andrew Unterberger With the first quarter of the 21st century coming to a close, Billboard is spending the next few months counting down our staff picks for the 25 greatest pop stars of the ...

Billboard has released its list of artists who have defined pop stardom since the turn of the century and some of the rankings are unexpected — especially since first place is still unannounced.

Billboard counts down the best country acts of the past (almost) 100 years. Ever since Ralph Peer held his famous recording ...