Canadian entering the USA from the UK

Hi there, I have scoured the forum but can't find a topic that fits my situation.. can someone please advise what I need to travel to the US?

I am a canadian citizen with a canuck passport, and have been living in the UK for several years.. I recently received my Indefinite Leave To Remain (a visa in my Can passport) but do not yet have my full UK naturalisation (i.e. UK passport). I am due to fly into Las Vegas and then travel to california for a wedding (total time there is 2 wks), do I need to fill out an ETSA or do I need any other kind of documentation (visa, etc)
besides my canadian passport to enter the United States? any advice would be greatly appreciated..!

Cdns are exempt from ETSA. Even if you also had a UK passport, you would stil be Cdn and exempt.