In 2 weeks I am the best man at a great musical friend's wedding. As part of my best man's speech, I'd like to sing a song to wish them all the very best. (Almost everything the groom and I do together is musical.) Most trad. songs about weddings seem to be tragic and therefore inappropriate, as do nearly all the love songs. So any ideas, please, for an appropriate best man's (traditional?) 'good wishes for your marriage' song?