Both pop singer Lady Gaga and hip-hop legend Dr. Dre were on hand to make appearances Monday (Sep 7) in Berlin, Germany at the Monster Cable Party at the Tube Clube.

Lady Gaga and Dr. Dre are currently on a promotional tour overseas raising brand awareness for Dre’s “Beats by Dre” headphone line, which now includes Lady Gaga’s fashion-inspired “Heart Beats” collection. They will be available for purchase sometime in October.