Who is no. 1

Rihanna’s latest single album based on projections from sales of ‘Only Girl (In The World)’, also could happen ending Katy Perry's run with "Teenage Dream".

‘Only Girl (In The World) which is officially released this week is already doing well on the Hot 100 at no.75 but sales of around 200,000 digital downloads could push her straight to no.1 or within, at least, the top 5.

If Rihanna pulls off the jump to no.1, "Only Girl (In The World)," will become her sixth solo no.1 single on the Hot 100 following ‘Rude Boy’, ‘Take A Bow’, ‘SOS’, ‘Disturbia’ and ‘Umbrella’.

Katy Perry's ‘Teenage Dream’ remains a top the Hot 100 this week, followed by Eminem's "Love The Way You Lie," ironically featuring Rihanna.

‘Only Girl (In The World)’ leads ‘Loud’, Rihanna's next studio album - one sources say will be more energetic, up tempo and dance heavy than the mostly dark ‘Russian Roulette’ featured ‘Rated R’.