Dirty Pretty Things, Sam Sparro and The National may be playing surprise sessions at this year's O2 Wireless.
All three acts are already scheduled to appear, but according to NME.com they could all perform unannounced sets over the weekend.
Dirty Pretty Things and The National are rumoured to be playing second slots on the Friday (4 July), while Sam Sparro is expected to play twice on the Saturday (5 July).
02 Wireless kicks off today (3 July) and will run until Sunday 6 July with Jay-Z, Morrissey, Fatboy Slim and Counting Crows headlining a day each respectively.
Check back for news, reviews and photographs from the event.