Watch Online Free on Watchseries. Avicii headlined T in the Park 2015 at Strathallan Castle, Scotland, on July 11, 2015. The set was well-received, with a large, enthusiastic crowd singing along to his hits like "Levels". This performance was part of the promotion for his second studio album, "Stories," which was released shortly after. The setlist included a mix of his popular tracks and new material from the upcoming album.