Pop sensation Katy Perry has managed to hold onto her No.1 position on the UK singles chart with 'Roar' as today's midweek update confirmed her as the country's highest selling artist.

'Roar' is set to spend a second week at the top spot on the UK Top 40 and it has become the fastest-selling UK single of Perry's career to date. The track shifted an impressive 179,500 copies in its first week of release and this week, it has sold another 50,000 units putting it firmly at No.1.

Ellie Goulding is at No.2 with her former chart-topper 'Burn', Coldplay have debuted at 7 with their 'Hunger Games: Catching Fire' soundtrack offering 'Atlas', and Swedish House Mafia have shot up a phenomenal 92 positions to No.30 with 'Don't You Worry Child'.

Elsewhere in the Top 40, Mutya Keisha Siobhan have climbed 10 spots to No.40 with 'Flatline', Icona Pop's 'I Love It' is at No.32, and One Direction's 'Best Song Ever' is at No.21.

Perry, meanwhile, tweeted a message to her fans in the UK last night to let them know that she is due to return to the country very soon: "Hey UK! I appreciate the love so much. In exchange I will be seeing you in both SEPTEMBER & OCTOBER. How's that for payback?"