Bike noise, creak, click, creaks, clicks, clicking, pinging sound - help

flip ... there's a funny squeaking noise. at first i thought it was the bars, but they are in tight, then i thought it might be the front wheel, but the more i listen, the less sure i am of where it's coming from? any tips on locating the squeaky bits?

There's probably a small rodent trapped inside your downtube.

Pet Shop Fixie Boy.