Rihanna and Britney Spears set for 'S&M' collaboration
Both singers tweet about forthcoming release
Rihanna and Cee Lo Green triumph at the Brit Awards
Singers win International Solo Artist gongs
Rihanna and Bruno Mars top the UK albums and singles charts
They're ahead of the likes of Jessie J and Plan B
Bruno Mars on track to beat Rihanna in UK singles chart
Plus Adele, British Sea Power and Plan B also on course to feature
Rihanna and Drake on course to end Matt Cardle's chart reign
Plus Plan B looks likely to return to the top of the album charts
Rihanna announces 2011 UK arena tour and ticket details
Singer set for six UK arena dates in October 2011
Rihanna prevents Take That from topping UK singles chart
Plus Susan Boyle is Number One in UK albums chart and Cee-Lo-Green scores a high new entry
Album Review: Rihanna - Loud (Def Jam/Mercury)
Rihanna holding off Take That in UK singles chart battle
Plus Thom Yorke's Remembrance Day 'silent single' set for Top 20
Rihanna to collaborate with Cheryl Cole in 2011
Cole confirms the pair will 'definitely' get together