Ariana Grande poses with her backup dancers just before showtime at Irving Plaza in New York City on Wednesday night (December 28).

The 18-year-old actress/singer debuted her brand-new song, “Honeymoon Avenue” to the packed crowd!

Ariana tweeted after the show, “I heard #WeLoveHoneymoonAvenue was trending earlier… Thank you guys so much!! Tonight was amazing. I love you! Goodnight, loves. <3 xoxo"

She added, "Had the best night ever last night.. Thank you again 2 everyone who came to the show!!! I hope you had a blast & enjoyed the music! xoxoxo ♥"

Tell us what you think of "Honeymoon Avenue" -- listen below!