Miranda Lambert's "Automatic" emerged from a strong pack of contenders to win the 2015 ACM Award for Song of the Year, the prestigious honor that is awarded to a tune's songwriters and publishers.

Lambert won with co-writers Nicolle Galyon and Natalie Hemby.

"Hello, Texas!," Lambert shouted after taking the stage. "It's good to be home tonight."

She then turned the microphone over to Hemby, who told Lambert, "I hope I can be your Dean Dillon, 'cause you're my George Strait."

Lambert's competition in the category was Kacey Musgraves' "Follow Your Arrow," Kenny Chesney's "American Kids," Luke Bryan's "Drink a Beer," Eric Church's "Give Me Back My Hometown" and Dierks Bentley's "I Hold On."

Lambert, the top ACM nominee tonight with eight nods, also won Song of the Year two years ago, for "Over You."

Big Moments in ACM Awards History

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