Pop fans have the chance to see chart-toppers like The Saturdays, Tinchy Strider and Stacey Solomon in a star-studded gig at London's O2.

The Messenger has teamed up with the Transformation Trust to offer readers tickets to the concert, which celebrates the charity's first birthday.

The prize comes courtesy of Lend Lease, one of the founding partners of the Transformation Trust and part-owner of Bluewater.

The concert starts at 2.30pm on Tuesday, July 13, with performers also including DJ Ironik, new boyband The Wanted, singer-songwriter Eliza Doolittle, Twenty Twenty and street dancers Status and Unity.

We've got 10 pairs of tickets to give away and with each pair comes a £100 Bluewater gift card for the winner to spend or share with their friend.

To be in with a chance of winning, answer the following question:

Where is Bluewater?

A) Dartford, Kent

B) Guildford, Surrey

C) Chelmsford, Essex

To enter text TRUST leave a space and add answer A, B or C plus your name and postcode to 80889. You will receive a text back confirming your entry. All replied texts cost 50p plus your standard network charge. Or email your answer, plus your name, address and contact details to gmdfcomps@thekmgroup.co.uk

Entries must be received by midnight on Sunday, July 11.

RULES You must be available on Tuesday, July 13, to attend. Children under the age of 16 must be accompanied by an adult. You must arrange your own transport to and from the event. Food and drink will not be provided as part of the prize. Tickets are non-transferable and no cash alternative will be offered. O2 Rules and regulations must be adhered to while on site. All replied messages cost 50p plus standard network charge. Messages received after the closing date will not be counted but may still be charged. By supplying your telephone number you consent to receive SMS messages from KM Group (directly or via its agents) and approved business partners regarding new promotions, products and services. Please add the word STOP at the end of your message if you do not wish to receive these messages. SMS service is provided by Mobile Interactive Group, The Tower Building, SE1 7NX. For quality and training purposes we may monitor communications. If you have any queries please call 01622 794660 between 10am and 5pm, Monday to Friday. For additional terms and conditions go to www.kentonline.co.uk/terms