Katy Perry Just Commented On John Mayer's Instagram About His Dad And It's Really Sweet

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So, as you probably know, John Mayer and Katy Perry used to date.

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Remember they had that song "Who You Love"?

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Unfortunately, they broke up in 2013 and have had very little interaction, beside Katy Perry recently ranking him first in bed on her Witness live stream.

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Well, on Thursday, Katy Perry commented on John Mayer's Instagram, which was a birthday post to his father.

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The caption read: "Happy 90th Birthday, Dad! Leave doting comments about my dad below. He’ll love scrolling through it. Also please stop this train. Thank you. 🎂"

John asked people to "leave doting comments" below, so that his dad could scroll through them later. AND...one of those commenters was KATY PERRY.

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Here's what she wrote:

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"Looking fantastic as ever! Happy birthday friend." AW, looks like there's no bad bl-- never mind, it's just cute, ok?

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