So far I've got:
"We are the happiest in the world" - Korea
"SOLEADO" - Italy
"Love is blue" - Europe
"Turkish March" by Mozart.
"The Sacred War" - Russia
"Song of Moscow" - Russia
"Blue Kerchief" - Russia
"Isle of Capri" - Italy
"Autumn Leaves" - France
"A Maiden's Prayer" by Bądarzewska
"The Blowing North Wind" - China
"Ode to the Motherland" - China
"Socialism is Good" - China
"Londonderry Air" - Ireland
"Romeo and Juliet"
"Tico Tico no Fuba" - Brazil
"The Skaters Waltz" - Europe
Tango "La Cumparsita" - Latin America
"Radetzkymarsch" - Italy
"Funiculi, Funicula" - Italy
"We are the happiest in the world" Korea

Are there any more or have I covered them all?