The In-N-Out obsession is not limited to regular customers.

For decades, the California-born burger chain has had a strange way of showing up in celebrity culture without feeling like a typical paid endorsement.

Britney Spears was photographed in a convertible at the drive-thru. Arnold Schwarzenegger has been seen eating there.

Helen Mirren famously ate an In-N-Out burger at the Vanity Fair Oscars party with her Oscar statue nearby.

Tiger Woods has eaten it from an In-N-Out truck at a golf tournament. Quentin Tarantino has been photographed with it, and Bernie Sanders made a campaign stop there during his 2016 presidential run.

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