Demi Lovato SHADES Former BFF Marissa Callahan in Twitter Rant? May 11, 2018 Usaadmin Celebrity News and Gossip </p> <h2>Demi Lovato SHADES Former BFF Marissa Callahan in Twitter Rant?</h2> <p>Demi Lovato went on a rant on Twitter, and fans think the harsh messages were directed at longtime best friend Marissa Callahan. </p> <p>
