They're not going to hang you for having THC in your blood.JR8 wrote: It's a death penalty in Singapore.
You inviting trouble by imagining you're somehow 'above it'.... you're not, they will hang you.
OP, are you dual-citizen Singaporean/Canadian? Or just Singaporean?
A Brit recently posted that he was deported and banned from Singapore. They caught him with a failed drug test of some sort on his way back from Thailand. I imagine as a young kid coming from Canada, your penalty will be harsh by Western standards but it won't be too terribly harsh. If your parents have a lot of money, they'll probably give you a big fine.