The Glasgow-based group's fourth album is due out late summer 2013
Roxanne Clifford will sing on the follow-up to 'Tonight... Franz Ferdinand'
Band play intimate hometown show in front of fans, friends and family
'Motion Sickness' will be released on December 3
Hear new single 'Round Town' on NME.COM now
Bloc Party also preview forthcoming album 'Four' at the European event
The Scottish quartet headlined the event with their first large-scale UK show since 2010
Fans queuing to get in to the band's gig in Sao Paolo are gassed by police
Band also covered Donna Summer during their live comeback
Singer advises new bands to steer clear of Oasis covers in Twitter rant