Here is a list of every song in the show and who sings/dances in them!
Act I
Oh, the Thinks You Can Think - WHOLE CAST
Horton Hears a Who - Jungle, Bird Girls, Cat, Jojo, Horton
Biggest Blame Fool - Sour Kangaroo, Young Kangaroo, Jungle, Horton, Wickershams, Bird Girls, Jojo, Cat, Gertrude, Mayzie, Yertle
Biggest Blame Fool Playoff/ Gertrude McFuzz - Sour Kangaroo, Jungle, Wickershams, Gertrude
Here On Who - Mayor, Mrs. Mayor, Jojo, Whos, Grinch, Horton
How to Raise a CHild - Mayor and Mrs. Mayor
Oh, the Thinks You Can Think (Reprise) - Cat and Jojo
It's Possible (Pt 1) - Jojo, Cat, Dancers, Bird Girls, Whos
It's Possible (Pt 2) - Jojo, Cat, Bird Girls, Whos
Alone In The Universe - Jojo and Horton
The One Feather Tail of Miss Gertrude McFuzz/Amayzing Mayzie - Gertrude, Bird Girls, Mayzie, Dancers
Amayzing Gertrude (Pt 1) - Gertrude, Dr. Dake, Bird Girls
Amayzing Gertrude (Pt 2) - Gertrude, Dr. Dake, Bird Girls, Dancers , Things 1 and 2
Intermission
Act II
Monkey Around/ Chasing the Whos - Wickershams, Horton, Sour Kangaroo, Bird Girls, Cat, Vlad Vladikoff, Jungle
Notice Me, Horton - Gertrude and Horton
How Lucky You Are - Mayzie and Cat
Mayzie's Exit/Horton Sits On the Egg/Dilemma/Hunters - Bird Girls, Horton, Gertrude, Things 1/2
Egg, Nest and Tree - Sour Kangaroo, Jungle, Bird Girls, Wickershams, Things 1/2, Horton
Sold/Mayzie In Palm Beach - Sour Kangaroo, Jungle, Bird Girls, Wickershams, Things 1/2, Horton, Mayzie
Mayzie In the Circus - Mayzie
Amayzing Horton - Horton and Mayzie
Alone In the Universe (Reprise 1) - Horton
Solla Sollew - Horton, Circus Animals (Whos), Jojo, Mayor and Mrs Mayor
All For You - Gertrude, Dr. Dake, Bird Girls, Horton
The WHos Return/The People Vs Horton the Elephant (pt 1) - Horton, Mayor, Mrs. Mayor, Jojo, Gertrude, Wickershams, Bird Girls, Sour Kangaroo, Young Kangaroo, Cat, Yertle the Turtle, Jungle, Dancers
The People Vs Horton the Elephant (Pt 2) - Horton, Mayor, Mrs. Mayor, Jojo, Gertrude, Wickershams, Bird Girls,
Sour Kangaroo, Young Kangaroo, Cat, Yertle the Turtle, Whos, Grinch, Jungle, Dancers
Yopp! - Horton, Gertrude, Sour Kangaroo, Young Kangaroo, Cat, Mayor, Mrs Mayor, Jojo, Wickershams,
Bird Girls, Yertle the Turtle, Whos, Grinch, Jungle
Alone In the Universe (Reprise 2) -Horton, Gertrude, Cat, Jojo
Oh, The Thinks You Can Think! (Finale) - Whole Cast
Green Eggs and Ham (Bows) - Whole Cast
Act I
Oh, the Thinks You Can Think - WHOLE CAST
Horton Hears a Who - Jungle, Bird Girls, Cat, Jojo, Horton
Biggest Blame Fool - Sour Kangaroo, Young Kangaroo, Jungle, Horton, Wickershams, Bird Girls, Jojo, Cat, Gertrude, Mayzie, Yertle
Biggest Blame Fool Playoff/ Gertrude McFuzz - Sour Kangaroo, Jungle, Wickershams, Gertrude
Here On Who - Mayor, Mrs. Mayor, Jojo, Whos, Grinch, Horton
How to Raise a CHild - Mayor and Mrs. Mayor
Oh, the Thinks You Can Think (Reprise) - Cat and Jojo
It's Possible (Pt 1) - Jojo, Cat, Dancers, Bird Girls, Whos
It's Possible (Pt 2) - Jojo, Cat, Bird Girls, Whos
Alone In The Universe - Jojo and Horton
The One Feather Tail of Miss Gertrude McFuzz/Amayzing Mayzie - Gertrude, Bird Girls, Mayzie, Dancers
Amayzing Gertrude (Pt 1) - Gertrude, Dr. Dake, Bird Girls
Amayzing Gertrude (Pt 2) - Gertrude, Dr. Dake, Bird Girls, Dancers , Things 1 and 2
Intermission
Act II
Monkey Around/ Chasing the Whos - Wickershams, Horton, Sour Kangaroo, Bird Girls, Cat, Vlad Vladikoff, Jungle
Notice Me, Horton - Gertrude and Horton
How Lucky You Are - Mayzie and Cat
Mayzie's Exit/Horton Sits On the Egg/Dilemma/Hunters - Bird Girls, Horton, Gertrude, Things 1/2
Egg, Nest and Tree - Sour Kangaroo, Jungle, Bird Girls, Wickershams, Things 1/2, Horton
Sold/Mayzie In Palm Beach - Sour Kangaroo, Jungle, Bird Girls, Wickershams, Things 1/2, Horton, Mayzie
Mayzie In the Circus - Mayzie
Amayzing Horton - Horton and Mayzie
Alone In the Universe (Reprise 1) - Horton
Solla Sollew - Horton, Circus Animals (Whos), Jojo, Mayor and Mrs Mayor
All For You - Gertrude, Dr. Dake, Bird Girls, Horton
The WHos Return/The People Vs Horton the Elephant (pt 1) - Horton, Mayor, Mrs. Mayor, Jojo, Gertrude, Wickershams, Bird Girls, Sour Kangaroo, Young Kangaroo, Cat, Yertle the Turtle, Jungle, Dancers
The People Vs Horton the Elephant (Pt 2) - Horton, Mayor, Mrs. Mayor, Jojo, Gertrude, Wickershams, Bird Girls,
Sour Kangaroo, Young Kangaroo, Cat, Yertle the Turtle, Whos, Grinch, Jungle, Dancers
Yopp! - Horton, Gertrude, Sour Kangaroo, Young Kangaroo, Cat, Mayor, Mrs Mayor, Jojo, Wickershams,
Bird Girls, Yertle the Turtle, Whos, Grinch, Jungle
Alone In the Universe (Reprise 2) -Horton, Gertrude, Cat, Jojo
Oh, The Thinks You Can Think! (Finale) - Whole Cast
Green Eggs and Ham (Bows) - Whole Cast