On June 18, 2013 West's sixth album "Yeezus" was released. The album got very good reviews from music critics. In November 2013 West gave a lecture at Harvard University. On November 15, 2013 Busta Rhymes' single "Thank You" was released. West rapped on it with Lil Wayne and Q-Tip. On November 24, 2013, West said in an interview that he is making his seventh album. "New Slaves" was nominated for Best Rap Song at the 2014 Grammy Awards. On June 27 2015, West headlined Glastonbury Festival 2015 to much controversy.