Bono and company were in New York recently putting the finishing touches on their latest studio album at the Electric Lady Studios in Manhattan.

This new album, the 13th album in U2’s discography, is as yet untitled but what is known is that the band has enlisted the mixing talents of musician/producer Danger Mouse of Gnarls Barkley fame.

In addition to Bono, The Edge, Adam Clayton, and Larry Mullen Jr., Coldplay’s Chris Martin was spotted on the scene, potentially as a featuring artist on the new album. Immediately following the wrap-up of the album, the band hosted a celebratory bash atop the studio.

Some famous faces turned up to wish the band success on the new album including Julian Casablancas of The Strokes and supermodel Helena Christensen.

At this rooftop celebration, the band also recorded an acoustic version video of ‘Sunday Bloody Sunday’ featuring Clayton on piano for “global participatory art project” Inside Out.

Though no official release date has been stated, Adam Clayton has expressed told AtU2, “[They] very much want to have a record out by the end of the year, September, October, November; that kind of time.”