Ari has joined the Raskasta Joulua (Heavy Christmas) - tour in Finland each year since 2007 (except 2017 for vocal cord infection) with a group of well known Finnish metal vocalists. They perform traditional and contemporary Christmas songs in heavy rock/metal style. From 2013 on the tour has been played in big concert halls, when they earlier performed mainly in clubs. Ari sings in 4 Heavy Christmas albums "Raskasta Joulua"(2013), "Raskasta joulua 2" (2014), "Tulkoon joulu - akustisesti" (2015) and "Raskasta joulua IV". The 2 first albums have sold Platinum (over 20 000 pcs) in Finland.