(Radio.com) To celebrate the last U.S. date of her Revival Tour, Selena Gomez decided to do something extra special for her fans. She surprised the stadium audience in Anaheim by inviting Charlie Puth out on stage to perform their duet "We Don't Talk Anymore" last weekend.

It marked the first time the two performed the song together live. As Gomez addressed the audience about how much the song meant to her, roadies wheeled Puth out on stage. He sat in front of a baby grand piano and began teasing listeners with hints of the song before the two jumped right into it.

Although Gomez spent the majority of the song standing at the piano or roaming the stage, she finally took a seat beside Puth near the end. She got cozy on the piano bench, leaning her head on his back and flashing him a big smile before bouncing away across stage again.

For those who insist that musical chemistry must equal physical chemistry, Gomez insisted back in September that Puth was just a friend. A very very good friend. Read more and check out the duet here.

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