Poland's Open'er Festival this July have confirmed four more names to join the line-up.
Open'er Festival in Poland today announced an extra show from Rihanna on the day following the festival which will be free for festival ticket holders.
Arctic Monkeys have joined Blur, Kings of Leon and Queens Of The Stone Age on the line-up for Poland's Open'er Festival next July.
Queens Of The Stone Age have been announced as the headline act playing the Main Stage at Open'er Festival 2013 on July 5th.
Blur have extended their 2013 European jaunt with a headline set at Poland's largest music festival, Heineken Open'er.