AceShowbiz - Kylie Jenner celebrated her 21st birthday party on Thursday night, August 9 with her sisters and celebrity friends, including Instagram star and Australian model Tammy Hembrow. During the birthday bash, which took place at hotspot Delilah in West Hollywood, Tammy unfortunately had to leave early as she collapsed and was rushed to the hospital.

The social media personality then posted on YouTube on August 12 a video of herself reassuring fans that she was okay. "So firstly, I just want everyone to know that I'm okay. I've had a lot of concerned followers messaging me and asking if I'm just alright. So, I just want to clear that up and say yes, I'm okay," Tammy said, before explaining the incident.

"So basically, I was in L.A. I was running off pretty much 30 hours of no sleep. I was struggling to stay awake even when I was getting my hair and makeup done. I was literally sitting there, like, falling asleep. Like, I could barely keep my eyes open," the fitness mentor told her 1.2 million subscribers. "I've been throwing myself into work way more than ever and also, I have my kids the majority of the time, [it's] literally been like a non-stop, on-the-go kind of thing."

In the video, Tammy also discussed her recent split from fiance Reece Hawkins, "I think because of the breakup I've been trying to keep myself busy and not really taking time to think about how I'm actually feeling or focusing on myself kind of thing."

"I probably, definitely shouldn't have been drinking because of how jet-lagged I was, because of how exhausted I was, and I already wasn't feeling well at all," she continued. "I was honestly fine at that point, and I was talking to a bunch of my friends; I was catching up with some people. So, yeah, I pretty much collapsed."

Meanwhile, Kylie has yet to comment on the incident at her birthday bash.