Moscow held the A Capella outdoor festival right now. It's awesome! The Moscow Spring A Cappella Festival is an open international contest for a cappella singers held as part of Moscow Seasons cycle of outdoor events. It's 12 festival days, 195 participants at 51 venues! The Cat's Pajamas Group, USA are on the stage. And me too :) The Moscow Spring A Cappella Festival. I visited several venues, listened to a dozen vocal groups. The festival involves vocal groups from Russia, Georgia, Hungary, Italy, Latvia, Singapore, Spain, Ukraine, USA, Germany, China, Israel, India, Korea, Portugal, Kazakhstan, England, Turkey, Austria, Philippines, Taiwan, Puerto Rico, Paraguay, Namibia, South Africa, Croatia, Sweden, and Finland. A.K.A. Crescendo Group, Croatia. The Moscow Spring A Cappella Festival. All performers sing without musical accompaniment, this is called A Capella. Some groups have amazing beatboxers who provides musical support with their unique vocal beats.