Apple iTunes is further making its mark on the live music scene in London with the launch of 11 nights of free collaborative concerts starting next week.

The unique acoustic performances include sets by KT Tunstall with fellow singer songwriter Billy Bragg (Feb. 24); former Moloko vocalist and now solo singer Roisin Murphy dueting with pop veteran Tony Christie (March 1); and alternative acts Nick Cave and The Bad Seeds teaming with Spiritualized (March 2).

The iTunes Live: London Sessions will take place at AIR Studios in Hampstead.

It follows the launch of the iTunes Festival: London last July, which featured a month of performances at the I.C.A. venue. Artists included Sir Paul McCartney, Amy Winehouse and Crowded House. Apple also stages a monthly iTunes Live From London show at its Regent Street store, with new pop solo artist Duffy performing this Friday (Feb. 15).

"It's very different to what we've done before," Oliver Schusser, director of iTunes Europe, tells Billboard.biz. "We're bringing multiple artists together. We actually went out and spoke with artists directly and said: Who would you like to perform with? So every night is a collaboration with at least two, and sometimes four, artists on stage."

The collaborations launch on Feb. 21 with singer songwriters Jose Gonzalez and Stephanie Dosen. The evening will also feature piano pop act Julian Velard from Brooklyn and acoustic singer songwriter Charlene Soraia, a recent Brit School graduate.

Schusser describes the line-up as a "sensational mix of well established artists and brand new talent". Other artists on the bill include Nizlopi and Soweto Kinch (Feb. 22), Laura Marling and the Mystery Jets (Feb. 27), and Jason Mraz and Ron Sexsmith (Feb. 28).

Of the 350-capacity venue, Schusser adds, "For a singer songwriter event of acoustic collaborations, AIR Studios is perfect. It's just about the right size and the acoustics are fantastic."

Live recordings of the performances will be made available for purchase on all 22 iTunes stores next month. Entry is free of charge for competition winners via www.ituneslive.co.uk. Apple would not confirm today if it has a TV broadcast partner for the event; Channel 4 screened last year's iTunes Festival: London.

Although Schusser did not confirm that the iTunes Festival: London will return in July, he says the inaugural event "succeeded all my expectations".

"The line-up was strong and [the live download tracks] sold really well across the world," he says. "It was a great branding exercise for us. We haven't made any announcement about where we take this and whether there will be more iTunes Festival. But the fact we're now starting a new event just shows you that live music in general works really well for us."