Song Title: Always Look On The Bright Side Of Life
Original Artist: Monty PythonIt's from 'The Life Of Brian'. If you haven't seen it, I strongly suggest you do. It's awesome!
I have another, because I couldn't choose just one!
Song Title: We Will Be Heroes (Pokemon Diamond and Pearl: Battle Dimension theme song)
Original Artist: I don't know! Whoever wrote the music for Pokemon!