This recording brings together music from some of Leonard Bernstein’s best-loved scores with seldom heard occasional works and premiere recordings. From the iconic musical West Side Story, the hot-blooded dance number Mambo embodies the show’s dramatic tensions. Slava! celebrates Bernstein’s friend and colleague, the cellist and conductor Mstislav Rostropovich, in music reworked from the daring show 1600 Pennsylvania Avenue, from which the Suite rescues further highlights. CBS Music has not been heard since the broadcasting giant’s 50th anniversary celebrations in 1978, while the Birthday Bouquet takes the form of affectionate musical tributes from eight composer colleagues to one of the 20th century’s greatest musicians.