Ok, so I believe the moderator in the pink shirt is Michael Mittermeier, a famous German comedian. If he talked Bavarian then it was him.

http://en.wikipedia.org/wiki/Live_8_concert%2C_Germany

The guy on the piano has to be Daniel Powter (not that I know of him).

http://www.danielpowter.com

The next link is a German Wikipedia page but it has a very nice list of all the artists and songs of each gig.

http://de.wikipedia.org/wiki/Live_8