I am really rather fond of the first one, no idea who is singing or what the title is but I have heard it and like it a lot! Will listen to the rest shortly PS I know it was used in a recent movie but I am sure I heard it before that.
It is by Pharrell Williams and it's called "Happy". It's in the soundtrack for Despicable Me 2... Not seen it though.
Yeah I watched that on the flight a couple of times, the selection of available movies was not great this time.