Olivia: In the winter, springtime, and fall
In the summertime, I call you a friend for all seasons
A friend, so many reasons why I like to be with you
Just like nature, we change, too

(Here, I think David sings something, then repeats what Olivia sang)

David and Olivia: Winter, spring, summer, fall
I wanna spend 'em all with you

Olivia: My friend!

David and Olivia: Winter, spring, summer, fall
I wanna spend 'em all with you

Olivia: My friend!

David and Olivia: Winter, spring, summer, fall
I wanna spend 'em all with you

Olivia: My friend!

David and Olivia: Winter, spring, summer, fall
I wanna spend 'em all with you

Olivia: Winter is cold, the ice and the snow

David: Springtime is warm; we watch the flowers grow

Olivia: And the hot sun of summer makes us throw away our cares

David: Autumn leaves (maybe something about frosty air?)