These are the songs by Chicago that have been used in setlists.

25 or 6 to 4

Performed by Chicago7
Performed as a song (by any artist)9

Alive Again

Performed by Chicago7

Anxiety's Moment

Performed by Chicago3

Beginnings

Performed by Chicago7

Call on Me

Performed by Chicago7

Colour My World

Performed by Chicago4

Dialogue (Part I & II)

Performed by Chicago7

Feelin' Stronger Every Day

Performed by Chicago7

Free

Performed by Chicago7

Hard Habit to Break

Performed by Chicago7

Hard to Say I'm Sorry / Get Away

Performed by Chicago6

If This Is Goodbye

Performed by Chicago4

If You Leave Me Now

Performed by Chicago7

(I've Been) Searchin' So Long

Performed by Chicago7

Just You 'n' Me

Performed by Chicago7

Make Me Smile

Performed by Chicago7

Mongonucleosis

Performed by Chicago7

Now More Than Ever

Performed by Chicago1

Old Days

Performed by Chicago7

Questions 67 & 68

Performed by Chicago7

Saturday in the Park

Performed by Chicago7

So Much to Say, So Much to Give

Performed by Chicago3

To Be Free / Now More Than Ever

Performed by Chicago3