Iha wrote and sang a number of Smashing Pumpkins' songs, such as: "Blew Away" on "Pisces Iscariot", "Bugg Superstar" on "Vieuphoria", "Take Me Down" on "Mellon Collie and the Infinite Sadness", "...Said Sadly", "Believe", "The Boy", and "The Bells" on "The Aeroplane Flies High", "Summer" on the "Perfect" single and "Go" on "Machina II/The Friends & Enemies of Modern Music".
Иха написал и исполнил несколько песен The Smashing Pumpkins: «Blew Away» на "Pisces Iscariot", «Bugg Superstar» на "Vieuphoria", «Take Me Down» на "Mellon Collie and the Infinite Sadness", «…Said Sadly», «Believe», «The Boy», и «The Bells» на "The Aeroplane Flies High", «Summer» на сингле «Perfect» и «Go» на "Machina II/The Friends & Enemies of Modern Music".