Andrea Bocelli AT THE Giorgio Armani/RED - An Inspi(RED) Evening Of Fashion And Music at Earls Court. London, England - 21.09.06

The blind opera star has confirmed to friends he will attend and sing at the event, reportedly due to take place at the Castello Odescalchi in Bracciano, near Rome.

A friend of Bocelli says, "They asked him to sing because Katie particularly likes AVE MARIA. It will give the ceremony a Catholic religious element, which is important to her."

Scientologist Cruise and Catholic Holmes have kept tight-lipped about their wedding plans, confirming only the big day will take place in Italy next weekend.

Source: WENN