Jul 15, 2013 at 2:30 am

Justin Timberlake & Jay-Z Duet 'Holy Grail' in London (Video)

Justin Timberlake and Jay-Z hit the main stage together for day three of the Yahoo! Wireless Festival held at Queen Elizabeth Olympic Park on Sunday (July 14) in London, England.

The 32-year-old entertainer and Jay-Z, 43, performed “Holy Grail” live for the first time at the big concert! Check out the video below.

“London… I have NO WORDS. That was a night I will never forget. Unreal. Hope you had as much fun as we did. #TNKids #WirelessFestival” Justin tweeted the evening before after his set.

Rihanna also joined Jay-Z on stage later in the evening.

Click inside to check out other songs from Justin and Jay-Z, including “Suit & Tie,” “Take Back the Night,” and “Mirrors.”

FYI: Jay-Z is wearing a Theory shirt.