Bethany Cosentino of Best Coast has put her vox towards a great cause and is giving back to the world. She has put some vocals towards a track by Black Iris titled, "When Will I Feel Love" which is in aid of a campaign for MTV Exit. The campaign aims to spread and raise the awareness of human trafficking. In the track Cosentino sings over piano-drivensong and it's nice to hear and easy on the ears. The video was done by Edouard Salier, and you can check it out at the top. Heavy stiff, for a heavy cause. Head on over to the MTV Exit website to learn more about the cause and see how you can help too. you can watch the video below.