iTunes Library not showing up in iMovie

Just updated to Yosemitie this afternoon and went to make a quick video game highlight video similar to ones I've done a bunch of times. I was easily able to add the video but when clicking on the iTunes button on the bottom left hand corner of iMovie, I don't have access to any of the 8,000 or so songs in my library. All i get is a blank pane where the music would normally appear and the words "The contents of your iTunes library will appear here", any ideas? I've been fooling with it for a good hour and between google and my usually tech savvy brain, I can't figure it out.