Of course, fans were completely floored when Tiësto launched into one of his latest remixes — an as yet unfinished mix of rapper Kanye West’s “Lost in This World.” At first it seemed it may have taken the audience a second to take stock of what they were actually hearing — West’s soulful lamenting lyrics over dark, hard-hitting synths and Tiësto drums. The pause was brief, as hands were in the air in a matter of moments. Tiësto revealed that the song is not yet finished, as he and West are collaborating on song tweaks.