There's apparently a Shakira song which features Rihanna. It's called Can't Remember to Forget You. The video has over 100 million views on YouTube, which makes sense. The video is pretty much two of the hottest women in the world grinding with each other whilst wearing few clothes.
You've probably gotten really annoyed at having to mute the video every time you watch it. Its such a pain. But, now there's a "Musicless" video of the song. No muting needed. Plus you get sound effects.