Afrojack – Pop on Acid Afrojack's got a gift for his Twitter followers and Facebook fans, and it's called "Pop on Acid." Related Posts: Relive standout sets from Ultra Japan’s fifth anniversary: Oliver Heldens, Galantis, Afrojack, + more Inaugural Tomorrowland Winter headliners announced, Armin Van Buuren, Steve Aoki, and Martin Garrix set to perform
