Continuing his nonstop publicity tour for The 20/20 Experience 2 of 2, Justin Timberlake gave an incredible performance at the iTunes Festival, rocking the stage of the Roundhouse in London yesterday, September 29.

As The Huffington Post reports, legions of fans turned out for the free event — including British chanteuse Adele, Star Trek Into Darkness stars Chris Pine, Alice Eve, and Benedict Cumberbatch, and TV chef Jamie Oliver — watching JT perform hits both new and old.

The festival is an annual, month-long occurrence — having always taken place in September at the Roundhouse ever since Apple Inc. set it up in 2007.

Lady Gaga started off the star-studded musical marathon this year, kicking off a lineup that included The Lumineers, Phoenix, Arctic Monkeys, Kings of Leon, Elton John, Avicii, Vampire Weekend, Kendrick Lamar, Ellie Goulding, and Robin Thicke. (And Katy Perry performs tonight, September 30, alongside Iggy Azalea and Icona Pop.)

For those not lucky enough to win tickets — or afford the cost of living in London, for that matter — all the performances are yours for the viewing on iTunes, Apple TV, and the official app.

Loving Justin's new tunes? Or do you just want him to bring the sexy back? Let us know below!

Source: The Huffington Post

Dan Clarendon is an assistant editor at Wetpaint Entertainment. Follow him on Twitter and Google+!