Ariana Grande - The HoneyMoon Tour.Venue: Ket Arena, Seattle-WA.
Most of the people in the crowd were wearing Cat Ears synced through an app with a barcode, Once synced, Cat ears would change colors with music and blink with bass. I found it super cool and made the overall experience of attending a concert that much exciting.
It was an amazing night. I really loved the overall production and the dancers were fantastic.