| Song Title | Source | Composer(s) |
| It's Burlesque | Night They Raided Minsky's, The
| Strouse |
| It's Cheesy |
| |
| It's Christmas | Annie
| Strouse |
| It's Commercial | Buccaneer, The
| Wilson |
| It's Dark | Dracula: a Rock Opera
| Briggs, West |
| It's De-lovely | Red, Hot and Blue!
| Porter |
| It's De-Merman |
| |
| It's Deductible | My Blue Heaven
| Arlen |
| It's Delightful Down in Chile | Gentlemen Prefer Blondes
| Styne |
| It's Delightful to Be Married | Great Ziegfeld, The
| various |
| It's Delightful to Be Married! | Tintypes
| various |
| It's Doom | Say, Darling
| Styne |
| It's Easy to Be Lonely | Earl of Ruston
| Link |
| It's Easy to Sing | Salad Days
| Slade |
| It's Easy To Sing (Reprise) | Salad Days
| Slade |
| It's Easy When You Know How | Foxy
| Dolan |
| It's Easy When You Know How | Free as Air
| Slade |
| It's Enough to Make a Lady Fall in Love | Darling of the Day
| Styne |
| It's Every Girl's Ambition | Through the Years
| Youmans |
| It's Everywhere | That Time of the Year
| Oliver, Levin, Cohen, Rosen, Ross, Wherry, Wilf |
| It's Exciting to Be Alive | Ride! Ride!
| Thwaites |
| It's Fate, Baby, It's Fate | Take Me Out to the Ball Game
| Edens |
| It's Foolish But It's Fun | Spring Parade
| Stolz |
| It's For Me | Breathe
| Martin |
| It's Fun to Think | All American
| Strouse |
| It's Funny About Love | Hark!
| Goggin, Solley |
| It's Getting Better | What's a Nice Country Like U.S. Doing in a State Like This?
| Hoffmann |
| It's Going to Be Good to Be Gone | I Remember Mama
| Rodgers |
| It's Gonna Be Alright | All The Fun Of The Fair
| Essex |
| It's Gonna Be Another Hot Day |
| |
| It's Gonna Be Good | Next to Normal
| Kitt |
| It's Gonna Be Good (Reprise) | Next to Normal
| Kitt |
| It's Gonna Be! | Princess Diana, the Musical
| Javitch |
| It's Good to Be Alive | Zulu And The Zayda, The
| Rome |
| It's Good to Be Alive | New Girl in Town
| Merrill |
| It's Good To Be Alive (Reprise) | New Girl in Town
| Merrill |
| It's Good to Be Back Home | Fade Out, Fade In
| Styne |
| It's Good to Be Here | Happy Hunting
| Karr |
| It's Good To Be Home | Thou Shalt Not
| Connick |
| It's Good To Be Home (Reprise) | Thou Shalt Not
| Connick |
| It's Gorgeous to Be Graceful | Be Yourself
| Rose |
| It's Got Be Love | On Your Toes
| Rodgers |
| It's Gotta Be Venus | Pageant
| Evans |
| It's Great To Be a Horse | Cowboy And The Tiger, The
| Beebe |
| It's Great to Be Alive | Arabian Nights
| Loeb, Lombardo |
| It's Great to Be Alive | Texas, Li'l Darlin'
| Dolan |
| It's Hard to Care | Shelter
| Ford |
| It's Hard to Speak My Heart | Parade
| Brown |
| It's Harry I'm Planning to Marry | Calamity Jane
| Fain |
| It's High Time | Gentlemen Prefer Blondes
| Styne |