Aussie model Tammy Hembrow explains why she was stretchered out from Kylie Jenner's party

The Australian model who collapsed at Kylie Jenner's 21st birthday party on the weekend has broken her silence.

Tammy Hembrow, 24, was photographed as she was carried out of the party lying face down on a stretcher.

The mother-of-two took to YouTube to explain to her fans what happened at the soiree which was attended by Kim Kardashian, Khloe Kardashian, Kourtney Kardashian, Kendall Jenner and their mum Kris Jenner.

"So yeah I pretty much collapsed," the Instagram star said. "Honestly, I'm like super embarrassed about it."

Hembrow said she's OK now but was battling exhaustion before the party began.

The Australian model collapsed while attending Kylie Jenner's 21st birthday part. Photo / Getty Images

"I was running off pretty much 30 hours of no sleep," she said.

"I was struggling to stay awake even when I was getting my hair and make-up done …

I probably definitely shouldn't have been drinking because of how jet-lagged I was, how exhausted I was and I already wasn't feeling well at all."

Hembrow, who has 8.6 million followers on Instagram and has modelled for Khloe Kardashian's clothing line, thanked her fans for their support and said she'll now take time to rest.