蜜月アン・ドゥ・トロワ (Mitsugetsu Un Deux Trois)

Background
Mitsugetsu Un Deux Trois is a jazz song using Rin Append's Warm voicebank. In addition to Japanese, some of its lyrics are sung in English and French ("un, deux, trois" means "one, two, three" in French). In February 2015 this song entered the Hall of Fame. It is featured in the album Kagamine★Fest 2013 starring Kagamine Rin・Len.