Rihanna has just announced two brand new concerts as part of her UK arena tour next year.

After adding an extra show at London's O2 Arena at the weekend, RiRi has now confirmed a third night at the venue for October 13th, 2011 and a second night at Glasgow's SECC on October 11th.

Rihanna Tickets are on sale now for the Glasgow show, while the new London date goes on sale tomorrow morning - Wednesday, December 15th.

The star will be performing songs from her new Loud album, along with her biggest hit singles.

Rihanna 2011 UK Tour Dates:

London O2 Arena - October 5
London O2 Arena - 6
Liverpool Echo Arena - 7
Manchester MEN - 9
Glasgow SECC - 10
Glasgow SECC - 11
London O2 Arena - 13
Birmingham LG Arena - 15
Newcastle Metro Radio Arena - 16