"Love the Way You Lie," a duet about domestic violence, knocked off Kate Perry's breezy summer anthem, "California Gurls."
"It was something that needed to be done," Rihanna told Access Hollywood about the song's theme, an abusive relationship.
"And the way he did it was so clever," the singer with the dramatic new red do said. "He (Eminem) basically just broke down the cycle of domestic violence, and it's something that a lot of people don't have a lot of insight on."
Rihanna is a survivor of domestic abuse. Her former boyfriend, performer Chris Brown, physically assaulted her in a Lamborghini last year.
The anticipatory buzz swirling around the video is almost as hot as the song itself.
Lost's Dominic Monaghan and the much-obsessed over Megan Fox have been caught on the set of the new video, rumored to be released next week. A long-lensed camera snapped the two actors sharing a kiss during the filming of the video, MTV reports.
Eminem and Rihanna will also appear in the video, which is being shot in Los Angeles. Building on her on-stage experience, Rihanna will soon try on big-screen acting.
The pop princess signed on to the film "Battleship," reported Variety. The movie will be a sci-fi adaptation of the classic board game.