Fantastic performance of one of later Chicago's best songs: Call On Me, performed by Leonid and Friends, from Ukraine. The lovely female is Ksenia Buzina. The others are: Serge Tiagnyriadno, lead vocal Igor Javad, drums Sergey Kashirin, guitar, backup vocal Vlad Senchillo, Rhodes piano Andrey Zyl, trumpet Maxim Likhachev, trombone Oleg Kudryavtcev, tenor sax Rei Frometa, other percussion