SEE IT: This nurse singing to a dying patient with her favorite song will bring tears to your eyes

Prepare to have your heartstrings tugged.

A Nashville, Tenn., nurse is making headlines after a video of her singing to a dying patient at Vanderbilt University Medical Center went viral.

The patient in question, 63-year-old Margaret Smith, was taken to the facility because her health began to decline, according to Fox 59. She'd been fighting liver cancer for nearly a year, but doctors said she wouldn't survive a transplant.

Olivia Nuefelder, the nurse in the video, was by Smith's bedside to comfort her with her favorite tune, "Dancing in the Sky" by Dani and Lizzy.

The video was posted on Facebook by Smith's daughter and has since been viewed more than 3 million times.

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"Words cannot describe the appreciation and love we feel for nurse Olivia, who Mom calls her angel," Megan Smith wrote on Facebook on Monday.

Smith's daughter added that in addition to singing to her, Nuefelder sat with Smith while her anesthesia wore off.

"Your dedication to your patients is beyond any that I have seen," Smith wrote. "You truly are a beam of light and I cannot thank you enough for the compassion and care and love you shared for my mother."

Smith was moved from the hospital to a nursing home in Cookeville, Tenn. She died on Wednesday.

Following her former patient's death, Nuefelder spoke with radio station 1010 WINS about her encounter with Smith.

"Knowing that she will be dancing in the heavens and singing with the angels helps me find peace during this somber time," she said.

"This experience has challenged me in many ways."