The Australian singer says she got a bad cause of the runs after meeting Donald Trump.

Sia says it was no laughing matter when the two of them met when they both appeared as guests on SNL (Saturday Night Live) back in 2005.

Sia revealed that she told the future US President to take a hike when he asked if she'd pose for a selfie with him.

After Donald Trump asked about taking the pic together, she said to him: "Actually, do you mind if we don’t? I have a lot of queer and Mexican fans, and I don’t want them to think that I support your views."

Sia recalls Donald Trump replying: “Oh, no problem. Then don’t.” She reckoned that Trump had a business-like attitude towards her rejection, “as if he viewed me as protecting my brand.”

But Sia revealed that she got such the creeps from meeting the future US President that she “couldn’t stop her body from physically reacting to Trump after they parted ways.” She added: “And then I went into my dressing room and had crazy diarrhoea."

#LSD Thunderclouds vid ⚡️🌩 ⚡️coming soon @labrinth @diplo - Team Sia pic.twitter.com/F0NOGTzRFD

— sia (@Sia) August 21, 2018