How do you make a Senate hearing more entertaining? Have the Frozen theme song accidentally play in the middle of someone's testimony!

That is exactly what happened to Senator Pat Roberts of Kansas.

Some sort of testimony was being given earlier today when the 78-year-old Senator's phone started ringing...with Frozen's "Let It Go" as the ringtone!

You only hear a moment of it in the clip, but the damage was done and a lot of people in the hearing got a good laugh.

The Senator seemed a bit embarrassed, but took his own advice and "Let It Go."

TMZ was kind enough to share the video and even reached out to the Senator's office about the ringtone.

His communications director says that ringtone is for his grandkids. He also apparently has Johnny Cash's "Walk the Line" as a ringtone too.

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