WASHINGTON (CNN) -- Some 2,500 traditionally dressed brides from all over the world stood next to their blue-suited grooms in a packed stadium Saturday morning, as the Rev. Sun Myung Moon blessed their marriages, many of which he arranged himself. But singer Whitney Houston, who was to be a headliner at Moon's "Blessing '97" event, was a no-show, ... Promoters of the event released a statement saying Houston was "unable to perform due to a sudden illness." [...] Many other well-known people also canceled appearances they were to make ... after it became widely known the events were tied to...