'Firstly I want everyone to know that I'm ok...So yeah I pretty much collapsed. Honestly I'm already like super super embarrassed about it,' Tammy said – appearing emotional on the clip.
'I probably, definitely shouldn't have been drinking because of how jet-lagged and exhausted I was and I already wasn't feeling well.’
Tammy then went on to give some background details of what caused her collapse.
'So basically what happened was I was in LA I was running off pretty much 30 hours of no sleep,’ the fitness model revealed.
‘I was struggling to stay awake even when I had my hair and makeup done...I could barely keep my eyes open.'
The star – who split from boyfriend Reece Hawkins earlier this year – then touched on the break-up.
'I've been throwing myself into work way more than ever and I have my kids majority of the time...literally been non-stop on the job kind of thing,' Tammy said.
'I think because of the break-up, I've been trying to keep myself busy and not really taking time to think about how I'm actually feeling.'
Back in June, Tammy opened up about her split from Reece Hawkins – explaining the pair had gone through ‘ups and downs like everybody’.
'One or two months ago, I decided to end things with Reece. He didn't cheat on me, I didn't cheat on him. It wasn't like that at all,' she said in another YouTube video.
The couple have two children together – Saskia, one, and Wolf, two.
'I don't want people to think we just gave up. Most people know relationships are very complex.'