Demi Lovato has asked her fans to take to Shazam to help book her upcoming European tour.

The singer has told her devotees in the continent to use the music identification app whenever they hear her song 'Neon Lights'.

The countries and places with the most amount of tags will then be considered for her Neon Lights European tour.

The singer has already confirmed one date in the region, which is due to take place at London's Koko on June 1.

The jaunt has already taken place in North America and she is currently performing to fans in South America.

The single 'Neon Lights' meanwhile features on the US star's 2013 self-titled album.

Watch Demi Lovato talk about her European tour below: