Katy Perry has unveiled a teaser video for her forthcoming single, 'Firework'.

The video, which can be watched below, shows the singer performing in a town square surrounded by dancers.

The song is the third single to be taken from Perry's second album 'Teenage Dream' and is released on November 15.

The singer performed the track on The X Factor on Saturday (October 16).

Meanwhile, tickets are on sale now for the UK and Ireland leg of Perry's 2011 California Dreams tour.

The jaunt kicks off with three dates in London from March 17-19.

Katy Perry - 'Firework':

(by Jason Gregory)