Thinking about my audience

From looking at Penny & Pounds MySpace I could see that a lot of their online friends were of the younger generation. So when thinking about my 'target audience' for the band and music video, I wanted to targeted at 15-25 year old. The band have a fresh/acoustic sound, with a quirky style I feel would appeal to that age range. However from looking at the bands which inspire Penny & Pound some are quite old folk bands from decades ago. So there could be a secondary audience that are older and enjoy listening to that genre of music. Although I would still like to find out if people of this age actually like to listen to the 'Folk Rock/Acoustic' music, so I'm going to send out a questionnaires to people within my age range.