Coldplay frontman Chris Martin has been spotted arriving at a New York recording studio withU2, sparking speculation that he may feature on the Irish rocker's new LP.
According to NME, Martin and all four members of the Bloody Sunday group were seen at the Electric Lady Studios in NYC on Friday (May 31) - where Danger Mouse is said to be mixing U2's latest offering.

It is thought a reporter from fansite atu2.com arrived at the studio after Bono, The Edge and Adam Clayton - where he witnessed Martin enter the building shortly before U2 drummer Larry Mullen Jr.
The same journalist later filmed the Paradise singer leaving the studio, with Martin denying he was there with U2.
However, he was later snapped in the background of private performance for creative art group Inside Out Project, with founder Artist JR tweeting a pic of Bono and The Edge… with Chris clearly seen in the background.

U2 in House :) twitter.com/JRart/status/3…

— JR (@JRart) June 1, 2013

U2 are yet to comment on the rumours, with Bono previously telling The Sun that their forthcoming album will only be released when it's ready.
Speaking of the record, he noted: "U2 have been back and they're really in fine fettle. They’re mad for it at the moment and they really want to make a new record. And they don’t care if it takes 10 years – they don’t care if it never happens again, they just want to get it right.
"Within the band we’ve been calling it '10 Reasons To Exist' – but I will tell you we might have at least six of them."