Olly Murs is currently #1 on iTunes ahead of WFL, but I think it will start to drop by the end of the week. She was behind in mid-weeks last week and the week before, but managed to top the official chart at the end of the week.
One Direction is her biggest competition in albums, but even if they beat her TTT will still peak @ #1 at some stage, like Loud did last year.
I know but Rihanna's AI is much higher, even if Bruno goes to #1 on iTunes, he would need at least 2 weeks to catch up with her AI unless WFL drops like a rock in sales (which I doubt)
can she get a 5th? 
KEEP GOING! 