CREATE TABLE table_name_24 (host_city VARCHAR, venue VARCHAR, theme VARCHAR)

What is the host city of the Singapore Indoor Stadium venue and a Valentine's Day theme?
SELECT host_city FROM table_name_24 WHERE venue = "singapore indoor stadium" AND theme = "valentine's day"
SELECT "host_city" FROM "table_name_24" WHERE "singapore indoor stadium" = "venue" AND "theme" = "valentine's day"