The singers will also be joined by Hot Chip, Kelis, Friendly Fires and Frankie Goes To Hollywood's Holly Johnson at the event, which takes place at London's Victoria Park between June 15 and June 17.
© PA Images / Nick Ansell/PA Wire
Friendly Fires announced: "We're thrilled to be playing the main stage of Lovebox this year. Having risen through the ranks after playing a small tent there in 2007, we're proud to again be part of a London summer institution."
Johnson added: "By amazing grace I have survived to perform at Lovebox 2012...My first London stage appearance in the 21st Century... Hollylujah!"
© PA Images
East London radio station Rinse FM, who have partnered up with the event, said it was "only right we team with Lovebox to create the radio experience in the park. It's extra special having the chance to bring our camp to a wider audience in our manor."
The three-day weekender is divided between Friday's "Bang the Box" day with Magnetic Man, Sub Focus and Crystal Castles, Saturday's "sonic mash-up" of headliners and Sunday's polysexual "Out and Out Fierce" day with the likes of Azari & iii and Niki & The Dove.
Last year's Lovebox headliners included Snoop Dogg, Blondie and The Human League.
Tickets, priced between £29.50 and £99, are available now.
> Lovebox music festival 2012 confirms earlier dates
View the full Lovebox lineup below:
Friday - Bang the Box
Main Stage
Hot Chip
Crystal Castles
Madeon
Big Top (Hosted by Rinse 106.8FM)
Magnetic Man
Zinc
Boy Better Know
P Money
Marcus Nasty
Plastician
N Type
Roska
Trim
The Stockade
2 Bears
Digital Soundboys Eastside Carnival
Sub Focus LIVE
Rusko
Shy Fx + Stamina MC
Breakage
The Toddla T Sound
Youngman Live
The Heatwave
B Traits
The NYC Downlow
Hessle Audio presents:
Pearson Sound
Ben UFO
Pangaea
Benji B
Picture Music pres Lapalux b2b Dauwd
Saturday
Main Stage
Friendly Fires
Emeli Sandé
Kelis
Little Dragon
Second Stage
Azealia Banks
Crazy P
The Big Top - Hospitality
Netsky
High Contrast
David Rodigan
Camo & Krooked
Danny Byrd
London Elektricity
SPY
Logistics
Nu:tone
The Prototypes
Fred V & Grafix
Hosted By:
Dynamite MC
Wrec
Lowqui
SP:MC
AD
Risky
The Stockade - Crosstown Rebels present A Rebel Rave
Damian Lazarus
Maceo Plex
Art Department
Amirali LIVE
Robert James
The NYC Downlow (Hosted by Warm & Electric Minds)
Dixon
Prosumer
Move D
Joy Orbison
Gerd Janson
Warm Residents
Sunday (Out & Out Fierce)
Main Stage
Holly Johnson
Azari & iii
Nikki & The Dove
Jonny Woo Etc
Second Stage (Hosted by Dalston Superstore)
The Rapture
Patrick Wolf
Tyson
Ronika
The Golden Filter
Penguin Prison
Big Top (Hosted by Gutterslut & Trailer Trash)
DJ Hell
Ivan Smagghe
Gutter Slut DJ's
Pr QX
Nic Fisher
Ralf
Miss Crystal MC
Trailer Trash DJ's
Hannah Holland
Mikki Most
The NYC Downlow (Hosted by Horsemeat Disco)
Jim Stanton and James Hillard
Luke Howard
Severino
Andrew Weatherall
Tim Sweeney
Optimo
The Stockade - This is…Circus
Kris Di Angelis
Jodie Harsh
Joshyou Are
