Katy Perry has extended the second UK leg of her California Dreams world tour.

The singer will now play a second night at the O2 Arena in London on October 15 and a third date at Glasgow’s SECC on November 1.

Perry’s California Dreams tour kicked off in Europe last month and is due to call for a first time in the UK in March.

It is in support of the American singer’s second album ‘Teenage Dream’.

Tickets for both new dates go on sale on Friday (March 11) at 9am.

Katy Perry’s new 2011 UK and Ireland tour dates are:

• Sheffield, Motorpoint Arena - October 12
• London, O2 Arena - 14/15
• Liverpool, Echo Arena - 18
• Cardiff, International Arena - 19
• Belfast, Odyssey Arena - 24
• Birmingham, NIA - 26
• Newcastle, Metro Arena - 27
• Aberdeen, AECC - 29
• Manchester, MEN - 31
• Glasgow, SECC - November 1/3/4
• Nottingham, Trent FM Arena - 5
• Dublin, O2 - 7

(by Jason Gregory)