7. (TIE) Rihanna -- "Disturbia" (Def
Jam) This slinky, ingenious dance-pop workout banishes any doubt
that the diminutive diva can match earlier earworms on the scale of "Umbrella,"
twirling its insistent, telegraphic beat, auto-tuned exclamations and fevered
lyrics into an
... moreindelible hit. (Credit: Sara DeBoer/Retna Ltd.) Close