Rihanna just added 8th London O2 to her upcoming tour which will be promoting her latest album ‘Loud’. Rihanna is doing a lot of concerts in the UK but nobody should be surprised. ‘Loud’ is certified 4 x platinum (1.200.000 copies sold) there and 7 nights at O2 Arena Are sold out. The concert will take place on December 21, 2011. Tickets go on sale on March 11, 2011.