Cantor Moshe Koussevitzky's Shabbat services were known far and wide and attracted packed crowds at Synagogue Beth El in Boro Park. The highlight of those service was the Birkas Hachodesh prayer recited on the Shabbos preceding the new Jewish month.
Cantor Israel Muller, chief cantor of the great Synagogue of Europe, was invited to sing at a local music festival in Belguim. He sang Retzeh (Schlossberg) and A Yiddishe Mama.