MMD HETALIA HELP!

I am still working on my 300 subs video (due to me having psychology homework DX ) I need an idea on what I should make for my 400 subs video (I am currently at 323 subs right now). I made a list and which country will sing...but one I had no idea on who. Here is the list:

Pure Imagination: England (Taho Cherry's model)

Old Devil Moon: Spain (UniDX) with Prussia (UniDX)

Finishing the Hat: Romano

What I Did For Love: Italy (Nachi Akira's)

All I Ask of You: Romano and Maddie (Hiji)

Bring Him Home: Romano

Empty chairs and empty tables: Prussia (UniDX)

If I loved you: Prussia (UniDX) and Hungary

Children will listen/Not while I am around: Spain/Romano???

Anthem: Romano (300 subs video) <-- It should be ready soon!

You'll Never Walk Alone: Romano

Le Temps Des Cathédrales: France (with Prussia with guitar)

Over the Rainbow: Romano

Try to Remember: Germany???

Gold Can Turn Into Sand: ???