Question: Who sang the song composed by Mariah Carey and Walter Afanasieff?
SQL: SELECT "Performer(s)" FROM "2-153569-2" WHERE "Composer(s)" = 'Mariah Carey and Walter Afanasieff';

Question: How many years was louis armstrong performing?
SQL: SELECT COUNT("Year") FROM "2-153569-2" WHERE "Performer(s)" = 'louis armstrong';