BR- they DID only sing it last week....and twice at that, so a very strange choice IMHO. They are effectively saying we know we haven't got anything left to offer that's better than this.
Nessun Dorma - good to bring in a classic operatic song, for contrast, since it is their true genre.
Creep - Radiohead sung as opera ? Interesting but they could have chosen a more complex Radiohead song....it's a pretty repetitive toon and the words are hardly uplifting, especially for a big final. Didn't like the sound check too much...
Smile - the wrong conertations for Steve given all the fuss about his own smile.
Higher and Higher - great choice, a nice bouncy optimisitic love song that he should do well with
Against all Odds - again good choice, Phil Collins is popular and Steve has a good version going by last night.