September 26 to I Know in 8 Steps
- September 26 is the birthday of Olivia Newton John
- Olivia Newton John is in the cast of Grease
- Grease cast includes John Travolta
- John Travolta is one of many artists that recorded It Had to Be You
- It Had to Be You was produced by Derek Taylor
- Derek Taylor produced Thanks for the Memory
- Thanks for the Memory was sung by Harry Nilsson
- Harry Nilsson wrote I Know