Pour It Up is the official 3rd single in the UK also... Don't think its going to do much over here ...
source:
http://www.radio1.gr/music/forthcoming_uk_singles.htm (reliable)
Rihanna - Pour It Up [29th Apr]
Ideally this should have happened...
Diamonds - September
Right Now - December (performed at XF final) - It charted at #35 the same week.
Stay - March (performed at Brit awards & Grammys)
Pour It Up - Sent to urban radio in May
Nobody's Business - Music video release May, Single released June
What Now - [5th WW single] music video in September released in September
Pour It Up - Sent to all radio formats [ Official 5th Single in U.S] Music video in August
released in Septemebr.
Lov7 Song/What Now - [6th & 7th U.S single ] (Dual release) released in December.
Singles: U.S
Diamonds
Right Now
Stay
Nobody's Business
Pour It Up
Lov7 Song
What Now
Singles: U.K
Diamonds
Right Now
Stay
Nobody's Business
What Now
I think it will go like this though
Pour It Up - 3rd
Nobody's Business -4th
What Now - 5th
if she was going to release Right Now she would have released it after Diamonds so and it would've been on her DWT setlist, so I think its high unlikely Right Now will get released.
next album should be summer 2015.