Tomas Christiansen (born 12 November 1969), better known by his stage name Tomas N'evergreen, is a pop singer from Aarhus, Denmark. The singles "Since You've Been Gone" and "Everytime (I See Your Smile)" were on top ten lists throughout Eastern Europe for more than a year and are still staples on FM radio.

His debut album "Since You've Been Gone" was a huge smash especially in Russia where it topped the charts and sold hundreds of thousands of units. Not bad for the once relatively unknown artist known to his friends home in Denmark as Tomas Christiansen. The album achieved this success without any promotion. Tomas's record label Mega Records was bought out by the German company Edel Music and a decision was made not to promote the release. This bit of bad news was enough to make Tomas's co-producer and musical collaborator Jacob Johansen leave the project.