Video: Chris Martin performs 'Aint No Love...' with Jay-Z at O2 Arena, London (Oct 11)

First a quick reminder that...

Last few hours to sign up to our Secret Santa 2013! (entry closed at midnight tonight CET) http://t.co/xoBPAd8Djl
— Coldplay news (@coldplaying) October 13, 2013

Chris Martin was a surprise stage guest for Jay-Z during a show at the O2 Arena in London on Friday night (October 11th). Full discussion on this latest performance is at the Coldplay forum now [thanks wabbit, gai, Tash, mayurshikotra, macky, LdySpace & PrincessofChina]Jay-Z was joined by Chris during his second night at London's O2, to perform 'Aint No Love (In The Heart Of The City)' together. You can watch a clip of the duet below:http://www.youtube.com/watch?v=ml45qRlEZyEFans took to Twitter after the show to speak of their amazement at seeing the live collaboration. "So Jay Z was unbelievable last night and he had Chris Martin as special guest. Timbaland was on the decks," wrote Will Newman after the huge gig. "Still can't believe I saw Jay Z last night and that he brought out Chris Martin," tweeted Jess Maynard. "Most amazing performance I have ever seen! Jay-z, timberland and an appearance from Chris Martin!!!" said Lauren Stoner. And then there was this, from Kelly-anne Williams:

JayZ was amazing at the O2 tonight. Chris Martin came on and did a duet, his pants were ridiculously tight
— kelly-anne williams (@Kellyanne_W) October 11, 2013

'Ain't No Love (In The Heart Of The City)' originally appeared on Jay Z's 2001 album, The Blueprint, sampling a track of the same name by soul singer Bobby Bland.Earlier in the day, Chris Martin, Jay-Z and Timbaland were seen by various bystanders at Waterloo underground station and later on the tube:

Strange but yet perfect combo - #JayZ #ChrisMartin pic.twitter.com/FUC2ZZym6X
— Atlas Project (@ColdplayAtlas) October 13, 2013

Jay Z on the tube just now with Timbaland and Chris Martin >>> http://t.co/hfsYkGS4FM
— DJ Target (@DJTarget) October 12, 2013

Chris Martin was also among the audience during Bruno Mars’ star-studded Moonshine Jungle gig in London a couple of days earlier (9th October). On Twitter, @RozzerM, the Head Of The Internet at Atlantic Records UK tweeted:

What do Bruno Mars,Beth Ditto &Chris Martin have in common? They were all just stood within 5 feet of me. Lucky buggars #MoonshineJungleTour
— Roz (@RozzerM) October 8, 2013

New photos: Jay Z and Chris Martin perform 'Ain't No Love (In The Heart Of The City)' live last night at London's O2 (11th October 2013):