Watch: Jay-Z, Justin Timberlake, And Rihanna Perform in London (Video)

    Jay-Z and Justin Timberlake were part of this years roster at the 2013 Yahoo Wireless Festival in London, where both J’s headlined the three-day music festival, giving us a little preview of what the Legends of The Summer tour will be like. Check the videos below for the performance of “Holy Grail” and even a little surprise guest appearance from Rihanna for “Run this Town.”