I actually like this poster, designed by Ariana Abud.  There is a lot of empty space at the top of the page and it might be good if the headliner had been put up there.  The background is beautiful and it looks like it was hand painted, but not a lot of thought went into the placement of the text.  The designer used the gradient from the top of the page to make the headliner stand out against the mountain.  You could reverse this effect and make the text stand out against the sky.  It would add a more interest if the artist hadn't used center alignment.  I love the colors because they are eye catching and captivating, plus the illustration gives the illusion of depth.