On the 2nd April 2005, he sang duet with New Zealand singer Hayley Westenra at the H.C Anderson jubilee concert. The song was the new official UNICEF song "Children First" It was originally intended that Antonio Banderas would sing the song with a Swedish duet partner, however Mr. Banderas couldn't make time for the show so Harket and Hayley Westenra had to step in.