But they both turned up at the festival on Friday to see headliner Justin Timberlake take to the stage at the Queen Elizabeth Olympic Park.
omg! watched JT's performance from an exclusive side of stage viewing area.
And before long we were joined by Jay Z (and his pretty sizeable entourage), including his Roc Nation prodige Rita Ora.
Rita, who previously made a surprise performance on stage with Snoop Dogg to perform 'Torn Apart', looked gorgeous in a meshed metallic green cape dress.
And she and Jay Z looked like they were having a ball as they danced to Justin together and laughed and chatted in the corner.
Later Jay Z joined Justin on stage for a duet of Take Back The Night.
Rita and Jay are both set to perform on the Main Stage later this evening, while Jay will be back on Sunday when he and Justin collaborate for their Legends of The Summer tour.
Other celebrities who were busting moves to Justin Timberlake were Lionel Richie (yes the legend was there too).
And we also hung out with Helen Flanagan and her mate, who left the gig early to head back to the Yahoo! VIP area for drinks (well those cocktails were pretty good).
Watch exclusive Yahoo! Wireless Festival LIVE stream at www.yahoo.co.uk/wireless from 4pm Sat & Sun
Updates from Yahoo Wireless
Louise Thompson defends herself over cheating claims … More »