Billie then further checked in on her fan and asked: "You need to come out or are you OK? Are you sure?"
She then mouthed, "I love you."
After the show resumed, the 20-year-old singer took an apparent swipe at Travis Scott, who continued performing at his Astroworld festival in November when people were being crushed in a crowd surge.
She said: "I wait for people to be OK until I keep going."
Scott was dropped from headlining the upcoming Coachella Valley Music and Arts Festival following the tragedy and it was recently revealed the 'Ocean Eyes' singer is one of the stars who will now be topping the bill, alongside Kanye West and Harry Styles.
In December, Billie revealed she was still experiencing problems after contracting Covid-19 earlier in the year.
She said: "I didn't die, and I wasn't gonna die, but that does not take away from how miserable it was.
"It was terrible. I still have side effects. I was sick for, like, two months almost."
She credited the vaccine with her being "fine" now, and admitted she felt "f****** horrible" when she was battling coronavirus.
She added: "I want it to be clear that it is because of the vaccine I'm fine. I think if I weren't vaccinated, I would have, like, died, because it was bad…
"When I say it was bad, I more just mean that it felt horrible. But really, in the scheme of Covid, it was not bad. You know what I mean? When you're sick, you feel f****** horrible."
- BANG! Showbiz
