Disturbia

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.)