The US-Barbadian's song has never been out of the Top 3 since its release and follows her previous Number 1s What's My Name, Only Girl (In The World), Run This Town, Take A Bow and Umbrella.
JLS made the highest new entry this week with Take A Chance On Me, the second single from forthcoming album Jukebox, straight in at Number 2. The boyband, runners-up on X Factor 2008, can now count eight Top 10 singles to their name.
Her What Do You Take Me For ft Pusha T is straight in at Number 10.
In the album chart, Susan Boyle secured a hat-trick of Number 1 records with Someone To Watch Over Me which flew in straight at the top spot.