The contest is being held to promote annual fundraising event Wrong Trousers Day.
This raises funds for the Wallace & Gromit's Children's Foundation by encouraging people to pay £1 to go to work or school in 'the wrong trousers'.
This year the charity is holding an X Factor-style competition launching in May. Wrong Trousers Rockout will have regional heats in ten cities as part of a national roadshow.
Global Tolerance will be handling national and regional media for the rockout, aiming to get people to take part in Wrong Trousers Day on 27 June.