Selena Gomez and David Letterman found common ground last night: both have made Justin Bieber cry.

David asked Selena if she's seeing anyone. "No, not yet," she replied. Then Letterman mentioned Bieber, her ex-boyfriend, who he's had as a guest on the show. "The last time he was on, we got into a conversation, and he said something, and I said something, and he said something, and I said something, and I made him cry," Letterman said.

Gomez quickly replied: "Well then, that makes two of us.”

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