Niall Horan Got Sick During One Direction Apple Music Festival Gig: What Happened?

Niall Horan sick during Apple music festival videoOh no, Niall!

During One Direction's Apple Music Festival performance yesterday, Niall Horan suddenly disappeared from the stage during the song "18"...but what happened? Was he okay? We were srsly worried about him!

There was a bit of panic among the boys, as Louis Tomlinson joked: "Where's the Irish one?" Harry commented: "We've lost another one! We're dropping like flies!" Too funny.

Liam Payne seemed to think Niall was ill, saying, "Niall has just developed a sudden sickness."

Rumors buzzed that Niall left the gig in an ambulance after nearly passing out, but it seems heat was the culprit here.

Niall explained the heat was getting to him: And, just so there's no confusion...he didn't need an ambulance:

via Source