Argentina fans of Björk was left disappointed when the Icelandic singer forced to cancel two shows in Buenos Aires after it was discovered that she has a nodule on her vocal chords. Music-news reports that she wrote on her official site and Facebook page, saying: "I’m sorry to say that i have a nodule on my vocal chords ... therefore cannot complete buenos aires gigs ... shame , as i really love the city and would have loved to stay longer . i hope i can go back later soon !!!" It is still uncertain if the situation is serious or if she will undergo surgery. Nodules have affected many singers at sometime in their careers and are usually caused by vocal strain, something that is becoming even more frequent due to the importance of touring in the current business environment. Most recently, Adele underwent surgery for the condition.