It Ain't Necessarily So by Oscar Peterson Overview Tag Appears on 101 Jazz Greats Buddy De Franco And Oscar Pete Gentlemen Sing the Blues Gershwin Songbooks Gershwin Songbooks (1952-1959) Jazz Ballads 08 Jazz Ballads 08: Oscar Peterson Jazz for a Lazy Day Jazz Radio Jazz 'Round Midnight Jazzy 08 Kuschel Jazz, Vol. 1 (disc 1) Oscar Peterson - 85 Essential Tracks Oscar Peterson Plays George Gershwin Oscar Peterson Plays 'Porgy and Bess' Oscar Peterson Plays Porgy And Bess Oscar Peterson Plays Porgy & Bess Oscar Peterson Plays the George Gershwin Song Book Oscar Peterson Plays The George Gershwin Songbook Oscar Peterson Plays The George Gershwin Song Book Plays Porgy And Bess Plays the George Gershwin Song Book Plays The George Gershwin Song Book plays the George Gershwin Song Book (1952-1959) Plays The George Gershwin Song Book (1952-1959) Porgy And Bess Standards Tells It Like It Is And In A N The Gershwin Songbooks The Greatest Collection The Song Books Vintage Jazz Collection Vol. 4 Playcount 8 Listeners 5