Question: Name the musical guest for panelists Jermaine Jackson and Nora Sands
SQL: SELECT "Musical Guest (Song performed)" FROM "1-1590967-4" WHERE "Who knows the most about the guest host? panelists" = 'Jermaine Jackson and Nora Sands';

Question: Name the total number of panelists for 19 January 2007
SQL: SELECT COUNT("Who knows the most about the guest host? panelists") FROM "1-1590967-4" WHERE "Air Date" = '19 January 2007';

Question: Name the panelists for David Tennant
SQL: SELECT "Who knows the most about the guest host? panelists" FROM "1-1590967-4" WHERE "Guest Host" = 'David Tennant';