At Fuji Rock Festival this past weekend, Mac DeMarco set aside a portion of his show to cover “Sukiyaki,” an old classic by Japanese crooner Kyu Sakamoto. Midway in, he brought out surprise guest Post Malone for a support role on the egg shaker. Watch it go down below, via Reddit.

It’s not the first time the pair have met—they were photographed together last year with YouTubers H3H3. Mac heads out on tour in August.

Read Jayson Greene’s latest Overtones column, “Learning to Love Post Malone.”