CREATE TABLE table_29550 ("Country" TEXT, "Name" TEXT, "Host ( s ) " TEXT, "Judges" TEXT, "Network" TEXT, "Air dates" TEXT)

Who is the host on the series aired on 18 January 2012?
SELECT "Host(s)" FROM table_29550 WHERE "Air dates" = '18 January 2012'
SELECT "Host(s)" FROM "table_29550" WHERE "Air dates" = '18 January 2012'