If you enter that string into a search engine and see only strange results, on them. Never enter credit card or email for a “free” challenge.
Given the specifics of your request, if "Martina the Big Challenge" is a game, tutorial, or guide directly available on i.mydrunkenstar.com, following the above steps should help you locate it. If it's a paid service or requires a subscription, ensure you're looking into legitimate methods of access. i mydrunkenstar com martina the big challenge free