Anyone who has seen Lady Gaga‘s sprawling live show The Mayhem Ball knows how theatrical Gaga manages to get on stage. Now, the superstar has won over another fan with her larger-than-life performance — musical theater legend Andrew Lloyd Webber.

In a new video posted online, Webber gave his official review of The Mayhem Ball after seeing the show during its four-show run at London’s O2 Arena two weeks ago, saying he loved the performance. “I loved the Lady Gaga concert, it was really fabulous. She really knows how to handle an audience,” the composer said in his video. “It was a great evening, it was so wonderful actually to see someone singing live rather than, as we know, some artists who are really miming to a pre-recorded track. And there was nothing of that there.”

After the video was posted, Gaga — who is a self-described lover of musical theater — saw and reacted to his video, posting a comment under the video expressing her admiration for Webber. Next to a crying emoji, Gaga simply wrote, “this is a dream come true.”

Elsewhere in his review, Webber pointed out that one particular moment in the show reminded him of one of his own shows — during The Mayhem Ball, Gaga boards a gilded gondola and is rowed down the stage, as she sings a gothic, operatic version of “Shallow.” Webber couldn’t help but draw comparisons between that moment and one of his most famous musicals, The Phantom of the Opera, which also contains a famous scene involving a gothic gondola ride.

“I was really, really pleased to see an opera house on stage, and even more pleased to see a boat with her in it being rowed across the big auditorium that is O2,” he said. “It reminded me of something that I might have had a little involvement with … But I thought the concert was absolutely fabulous, and I think Lady Gaga is absolutely a world superstar.”

Watch Webber’s full video praising Gaga’s show below: