EXCLUSIVE: Maren Morris on Making Her Acting Debut in 'NCIS: New Orleans' Guest Appearance

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Only ET was behind the scenes as Maren Morris filmed her upcoming guest appearance on NCIS: New Orleans!

"Being a part of NCIS: New Orleans has been crazy. I've never done anything like this," Morris told ET. "I've never done any sort of scripted drama series, so this is so cool to see how it all works."

WATCH: New 'NCIS: New Orleans' Regular Vanessa Ferlito Teases Her Introduction

The 26-year-old country music star is taking her act to primetime for the CBS drama, in which she makes her acting debut playing herself in the Valentine's Day episode.

The story will follow the team as they search for a missing terrorist playbook. Morris makes a cameo by belting out her breakout single, "My Church," in a bar.

Morris scored four GRAMMY nominations for "My Church," which is the most nominations for a country artist at Sunday’s awards show.

"I was basically woken up to my phone vibrating like crazy," Morris said, remembering the morning GRAMMY nominations were announced. "I thought it was a weather alert or something. It was my friends and family texting me. It was insane and so cool. It was probably the best wake-up call I've ever gotten."

RELATED: Why Scott Bakula Is the Perfect Lead for 'NCIS: New Orleans'

After being rejected by The Voice and American Idol, the tune made Morris a star by helping her score a record deal. The song went on to crack the top five on Billboard's Hot Country Songs list and it has racked up more than 23 million views on YouTube.

NCIS: New Orleans airs Tuesdays at 10 p.m. ET/PT on CBS.