All of these songs can be sung to each other's tunes perfectly

Gilligan's Island Amazing Grace Mickey Mouse Club Theme Song Stairway to Heaven House of the Rising Sun Yankee Doodle Pop Goes the Weasel Peaceful Easy Feeling I’d Like to Teach the World to Sing Yellow Rose of Texas Ghost Riders of the Sky Rocky Top Lion Sleeps Tonight Tangled Up in Blue Whiter Shade of Pale Light My Fire O Little Town of Bethlehem Jingle Bells God Rest Ye Merry, Gentlemen Greensleeves Jolly Old St. Nicholas The First Noel O Tannenbaum It Came Upon a Midnight Clear I’ll Be Home for Christmas Take Me Out to the Ball Game In-a-Gadda-da-Vida Marines’ Hymn Wabash Cannonball America the Beautiful The Internationale Onward Christian Soldiers Ode to Joy Mack the Knife A Hundred Bottles of Beer Clementine La Cucaracha Semper Paratus The Wearing of the Green (The Rising of the Moon) The Itsy-Bitsy Spider I’ve Been Working on the Railroad Sympathy for the Devil Rollin’ Down to Old Maui Acres of Clams Bread and Roses Sink the Bismarck Forest Green (UK “Little Town of Bethlehem”) Tomorrow Belongs to Me The Girl I Left Behind Me The Wabash Cannonball MacNamara’s Band