Transcript for Unlikely Guest at Katy Perry Concert: GMA's Dan Harris
This is my favorite part of the day. Katy Perry played to a packed house last night. Her press matic show delighting teenage girls and our in-house teenage girl, Dan Harris. Our very own Dan Harris with his lovely wife. I can almost see it and hear it. Not so great. Here he is in a fan boy moment taping her with his phone. Oh, you are so cute. Look how beautiful Bianca is. She is always beautiful. I have to say Katy Perry, me, my wife and like a sea of screaming 1-year-oldses. Did you fit in? Katy Perry is she is phenomenal. Extraordinary performer and we went with a very dear friend, Ricky and they are close to Katy so we got to go backstage. I was even more impressive than her stage performance which is a marathon. Backstage she is the most down to Earth pleasant person to be around and about to go on stage in front of X thousands of Numbers of people and completely calm. I love hearing that because sometimes you hear people meet people and it's a disappointment. So nice to hear. A Katy Perry fan, you've been outed. For years he liked to work out to her so now it's out. Roar, Dan, roar. Oh, my gosh. Still to come -- finish. Happy birthday. Thank you very much. Today is my 43rd birthday and I'm very happy to spend it with you guys and later with my wife and last night with Katy Perry and my wife. Good run. Karaoke with Huey lewis. Probably not. We'll be right back. I didn't know you were such a fan. ?
This transcript has been automatically generated and may not be 100% accurate.