5. Rihanna f/ Jay-Z "Umbrella" (2007)
Album: Good Girl Gone Bad
Producer: Tricky Stewart
This is the moment when Rihanna made the switch from "cute girl with some nice songs" to the titanic pop figure we know her as today. "Umbrella" was anchored by a strong concept, propelled by catchy songwriting, and sold by the dynamic personalities on the bill. Ever since its release to an overwhelmingly positive reception, seeing Rihanna hit No. 1 on the charts has never come as a surprise again.