A group of loved ones gathered outside an assisted living facility to serenade their 87-year-old grandmother.

The video, shared on Twitter by Rebecca Roy, shows her and her family singing "You Are My Sunshine" in Waterford, Michigan. The surprise was meant for Roy's grandma, Cherrill Flynn, but residents started emerging from their rooms to also enjoy the show.

PHOTO: Rebecca Roy tweeted a video of her and her family singing "You Are My Sunshine" in Waterford, Michigan. The surprise was meant for Roy's grandma, Cherrill Flynn, but residents started emerging from their rooms to also enjoy the show.
Chris Turner
Rebecca Roy tweeted a video of her and her family singing "You Are My Sunshine" in Waterford, Michigan. The surprise was meant for Roy's grandma, Cherrill Flynn, but residents started emerging from their rooms to also enjoy the show.

"We said, 'We're here for my grandma' and they stayed," Roy told "Good Morning America." "This is difficult for her but health-wise, she's doing very well. She loves to read and write. Her mind is sharp as a tack so we're very lucky."

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PHOTO: Rebecca Roy tweeted a video of her and her family singing "You Are My Sunshine" in Waterford, Michigan. The surprise was meant for Roy's grandma, Cherrill Flynn, but residents started emerging from their rooms to also enjoy the show.
Chris Turner
Rebecca Roy tweeted a video of her and her family singing "You Are My Sunshine" in Waterford, Michigan. The surprise was meant for Roy's grandma, Cherrill Flynn, but residents started emerging from their rooms to also enjoy the show.
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Cherrill was married to the late Dale Flynn for over 30 years. The couple had five children, 11 grandchildren and two great-grandchildren.

PHOTO: Rebecca Roy is seen with her grandmother, Cherrill Flynn, 87, her sister Meredith Turner and mother, Sandy turner, in an undated family photo in Michigan.
Chris Turner
Rebecca Roy is seen with her grandmother, Cherrill Flynn, 87, her sister Meredith Turner and mother, Sandy turner, in an undated family photo in Michigan.
PHOTO: Rebecca Roy is seen with her grandmother, Cherrill Flynn, 87, in an undated family photo in Michigan.
Rebecca Roy
Rebecca Roy is seen with her grandmother, Cherrill Flynn, 87, in an undated family photo in Michigan.
PHOTO: Rebecca Roy tweeted a video of her and her family singing "You Are My Sunshine" in Waterford, Michigan. The surprise was meant for Roy's grandma, Cherrill Flynn, but residents started emerging from their rooms to also enjoy the show.
Chris Turner
Rebecca Roy tweeted a video of her and her family singing "You Are My Sunshine" in Waterford, Michigan. The surprise was meant for Roy's grandma, Cherrill Flynn, but residents started emerging from their rooms to also enjoy the show.

Roy said her family was happy fellow residents were entertained while in quarantine.