Classical music

[fletchera]

I need help with a classical music quiz please.
I have been given the initial letters and how many letters in the words.

1 - S.P.F (5.4.5)
2 - W.O.T.F (5.2.3.7)
3 - S.F.T.F.S (6.4.3.4.7)
4 - C.O.H.S (6.2.6.6)
5 - T.B.D (3.4.6) The Blue Danube??????

Thanks in advance.

[dundurn]

2 Waltz of the Flowers - Tchaikovsky, Nutcracker Suite

[dundurn]

4 Chorus of Hebrew Slaves - Verdi, Nabucco

[dundurn]

3 Two answers, take your pick!
Spring from The Four Seasons - Vivaldi
Summer from The Four Seasons - still Vivaldi

[dundurn]

Sugar Plum Fairy (,Dance of the) - Tchaikovsky, Nutcracker Suite

and The Blue Danube, Johann Strauss II seemed OK for #5