with passionate opinions about where to find the perfect ones. ♪ ♪ i'm on my way to meet a taco authority who's gonna show me his new favorite. ♪ ♪ so i'm meeting my friend ricardo. he's the reason i even know mexico city. the first time i ever came to mexico city was because of my friend ricardo. and he's also the guy who introduced me to my husband. he always knows the new hot spot. like, if it just opened, he's already been. and today, he's showing me a new taco place, and i am always up for a new taco place. - hola. [laughs] - how long have i been coming to mexico city? - for 17 years now. - that's how long we've known each other. don't you think the food scene has changed? - oh, it's changed a lot. everything's changed. - well, remember when i would come, and i said the only thing i want to eat... - tacos? - is tacos. - yeah. - and we would go to all the little stands. - yeah. - but now it's like tacos have gotten fancy. - and now this place is like it's a high-end chef...