I am uncertain on how long my song should be when I (the Bride) walks down the aisle. I really want "A thousand Years" by Christina Perri. I know I will not be able to use the entire song, which is ok but is 1:30 too long? and is letting the song play for :20 seconds before I begin to walk down too long? I am getting married at the Cathedral and the aisle is actually quite long, I have been told it only takes about 20-15 seconds to walk down and I want the song to play for about 10 seconds after I meet my Groom.