In all types of presentations, there are set standards to which people follow. Once in a while though, there are those who will break the mold and try something different and that person will have great success. Music is the same way. There is usually a formula that people follow (especially pop music) and no one strays too far from that process. However, you do occasionally get those artists who push the envelope and do some experimenting and it just works. Robert Plant and Allison Krauss did the latter with their Album 'Raising Sand' and last night at the Grammy's they won five awards including album of the year.