Colbert thought they were singing about each other.

Hes my best friend.

It soon dawned on Martin that Colbert considered him a best friend.

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Credit: CBS

Im sorry, Stephen, were just not friends.

Told by Colbert they had actually met three times, Martin added, TV friends is not real friends.

He called Colbert an acquaintance as the crowd let out a collective aww.

Stephen, actual friends dont sign autographs for each other, Martin said.

Thats why Im going to get your autograph later.

Watch the song below, where both men come to an agreement… on Gary.