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Just when you got that damn tune out of your head.

A pop-up restaurant in the style of Japanese comedian Piko Taro's "Pen Pineapple Apple Pen" ditty has opened for business in Tokyo.

The restaurant serves dishes with plenty of (surprise!) pineapple and apple in them. Because they're sweet, the menu leans heavily on dessert items, but RocketNews24points out that there's also a burger that relies on clever Japanese wordplay.

The "PPAPan" burger keeps the song’s acronym...by having the letters stand for Pan (the Japanese word for “bread”) P/Bulgogi (Korean-style marinated beef), Avocado, and, (another layer of bread) Pan.

Many of the desserts also appear to include chocolate sticks as the "pens."

People have been heading to the quirky restaurant for photo ops, posting with #ppapcafe and #ppapカフェ.

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