Romanian-born British soprano Simona Mihai has cancelled the Oct. 3 performance of Musetta in “La bohème” due to illness. As a result, the role will be sung by Lebanese-Canadian soprano Joyce El-Khoury, who is scheduled to perform the role on Oct. 6, 7 and 10. However, Mihai will sing the role of Mimì on Oct. 6 and 10. She is {…}