It seems possible that Te Kanawa was also worried about being in the line of fire from randy Farnham fans, who might not always accurately aim their undergarments.
The Associated Press reports that the joint concerts' promoters, Leading Edge Events (who now seem to have their own knickers in a twist), are suing Te Kanawa, 62, and her former manager, Nick Grace, for alleged breach of contract and up to A$2 million Australian dollars (currently US$1.5 million).
Te Kanawa became aware of the intimate apparel issue after watching a DVD of a 2003 live performance by Farnham, according to the AP.