Silly iMovie question...

... is there a simple way to take a single image and associate it with a piece of music (thus producing one of those YouTube videos which consists of a piece of music with a labeling image)? At the moment the only way I've found that works is to create a Quicktime video which is the length of the musical selection, said video consisting of many, many duplicates of the original image, then import the video and add the music track.