Wretzky is the credited Bassist on the Smashing Pumpkins' first five studio albums: Gish, Siamese Dream, Mellon Collie and the Infinite Sadness, Adore, and Machina/The Machines of God. It was confirmed by both her and Corgan, however, that Corgan played the bass tracks for Siamese Dream because he could complete them in far fewer takes. Wretzky often contributed backing vocals in concert, and on studio albums. She contributes vocally in some Smashing Pumpkins songs including "Daydream" from Gish, many songs on Siamese Dream, "1979", "Cupid De Locke", "Farewell and Goodnight", "Beautiful"; "Where Boys Fear To Tread" from Mellon Collie, and "Dreaming" and "The Bells" from The Aeroplane Flies High. Wretzky also co-wrote one Smashing Pumpkins song, "Daughter".