Question: Name the number one singles for  Desvarieux, Jacob
SQL: SELECT "Number-one single(s)" FROM "1-27441210-5" WHERE "Artist" = 'Desvarieux, Jacob';

Question: Name the least weeks at number 1 for 1988
SQL: SELECT MIN("Weeks at #1") FROM "1-27441210-5" WHERE "Year" = 1988.0;