The singer has topped the chart with 'All About Tonight', while pop five-piece The Saturdays closely trail with their new track 'All Fired Up'.
Maroon 5 slip a place down to three with Christina Aguilera collaboration 'Moves Like Jagger' and Leona Lewis enters the chart at four with new single 'Collide'.
Former number one 'Stay Awake' by Example tumbles to five, while Sean Kingston's 'Party All Night' continues to rise by moving up two places to eight.
Snow Patrol are lingering just outside the top ten at 11 with new track 'Called Out In The Dark' and Adele's 'Someone Like You' shoots up 13 places to 14 following her performance on last week's MTV VMAs.
Further down the chart, Ms. Dynamite enters at 26 with her new song 'Neva Soft', and the latest cut from Rihanna's Loud, 'Cheers (Drink To That)', lands at 28.
Example has topped the midweek album chart with his third studio record Playing In The Shadows.
Adele moves up two places to two with 21, while David Guetta's Nothing But The Beat completes the top three.
Further new entries come from Doris Day with her new album My Heart, which is currently sitting at number nine, and Santo Spirito Blues by Chris Rea, which rounds off the top ten.
> View the current singles top 100 here
Watch the music video for Pixie Lott's 'All About Tonight' below: