Since December, Labianca’s People (Did you check On Me), a heartfelt plea for assistance that caught her at a heartbreaking low moment, has been streamed more than 150 million times.
It has topped the UK Afrobeats chart for eight weeks. It is currently positioned to enter the official Top 10, which would be a first for a Cameroonian musician.
"My whole life changed in a matter of hours," says the singer. "I woke up in the morning and things had just flipped over."
If you've heard People, you'll know it from the hook alone.
"I've been drinking more alcohol for the last five days... Did you check on me?" sings the 22-year-old, her voice melancholy and mellifluous over a simple music box.
Her experience with the uncommon mood disorder cyclothymia, which results in emotional ups and downs similar to but less severe than those of bipolar disorder, is discussed in the lyrics.
After hosting a Thanksgiving gathering when she "felt invisible," she created the song last November.
"I'd been at a low point of my life for at least two weeks and I was just like, 'I can't take any more of this'," she explains over the phone from Paris.
"There were self-harmful thoughts, over-thinking, really anxious - a bunch of things going on in my head."
While her friends were celebrating, Libianca spent much of the night crying in the bathroom.
When she came downstairs, no-one noticed her puffy red eyes. No-one asked how she was. They simply offered her a drink.
"I felt like I was drowning in it and nobody could see me and I just needed some help.
"So I decided, you know what? Let me just go in the studio, because I feel better whenever I've done something productive. That helps me.
"I wasn't expecting for People to come out. It's just how I was feeling. I couldn't write about anything else."
As she withdrew to her Minneapolis home's studio, her emotions overflowed unrestrainedly.
She claims that the "raw truth" of her drinking serves as the hook. She'd been trying to drown out her depression for days by drinking tequila and Ouzo with wine chasers.
"Whenever I was drunk, I didn't feel sad, so why not just drink some more?" she recalls.
"Clearly, after a few days, I was like, I can't keep going like this. I can't keep waking up every morning hung over."
"Right now I have the opportunity to show the rest of the world this is what I'm capable of."
But the key to the song is the repeated refrain of "did you check on me?" It's a post-pandemic plea to ask your friends how they're really coping.
"After Covid, I feel like a lot of people became isolated. And no matter what anybody is going through, if you ask them, 'How are you doing?', the first thing they're going to say is, 'I'm fine'. It's an automatic response.
"And I think what People is doing is breaking that [spell] and helping people to be more vulnerable and say, 'I'm not doing well. I really need a hug from you right now'.
The reaction has been overwhelming.
A fan from YouTube commented, "As I'm going through my fourth panic attack of the day.... This song just makes me feel like I am not the only one."
"This song has been my best friend for the past few weeks," wrote another, who said Libianca's music had comforted her after losing a child.
The comments page is full of similar stories. Encouragingly, it's also full of strangers offering support and consolation.
"I couldn't be more proud," says Libianca, "because it's really helping people get the support they need.
"And it helped me as well, because my friends didn't know that's how I was feeling when I recorded that song."
The message has resonated globally. People is at number three in India, number five in New Zealand and number one in Nigeria.
For Libianca, it's the culmination of more than 10 years as a musician, and a vindication after a stint on the US version of The Voice in 2021.
