Each verse goes like this:
D5                        A5          D5
You gotta sing when the spirit says sing
D5                                   A5
You gotta sing when the spirit says sing
D5                                    G5
When the spirit says sing, you gotta sing right along
D5              A5          D5
Sing when the spirit says sing

Then repeat for each verse:
You gotta clap...
You gotta hum...
You gotta snap...
You gotta swim...
You gotta stomp...
You gotta hush...
You gotta sing...

The ending goes like this:
D5                        A5          D5
You gotta sing when the spirit says sing
G5                       A5          D5
You gotta sing when the spirit says sing
G5                       A5          D5
You gotta sing when the spirit says sing
D5                            A5          D5
And you gotta stop when the spirit says stop

For the two outro chords, play the top 3 strings (GBE) at the 7th and then 8th frets.

Note: the Gm7 is played as 353333

Enjoy!