Katy Perry finished iTunes Festival proceedings last night (30.9.13) as she closed the event with an incredible 45-minute set.
The singer performed at London's Roundhouse to mark the end of the month-long event, featuring songs such as 'Teenage Dream' and new track 'Walking On Air' from her upcoming album 'Prism'.
Opening with new song 'Walking on Air', Katy - who performed with nine backing dancers - then launched into 'California Gurls', 'Teenage Dreams' and 'I Kissed a Girl' before treating fans to another new track, the uptempo 'Dark Horse'.
She later showcased another song from 'Prism', 'By The Grace of God', a piano-backed track about her failed marriage to comic Russell Brand.
The brunette beauty - who changed outfits twice during the 10-song performance - rounded off the show with a stripped-down rendition of 'Firework', backed by a string section, and her recent number one single 'Roar', which she sang from inside a mock boxing ring.
Leaving the stage, she said: "Thank you London, I've had a fantastic time."
Meanwhile, Katy has also announced the tracklisting for 'Prism', which is released on October 18.
Tracklist for Prism:
1. 'Roar'
2. 'Legendary Lovers'
3. 'Birthday'
4. 'Walking On Air'
5. 'Unconditionally'
6. 'Dark Horse' (feat. Juicy J)
7. 'This Is How We Do'
8. 'International Smile'
9. 'Ghost'
10. 'Love Me This'
11. 'Moment'
12. 'Double Rainbow'
13. 'By the Grace of God'
14. 'Spiritual'
15. 'It Takes Two'
16. 'Choose Your Battles'
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