i want to thank my guests, adam levine, earvin "magic" johnson, and of course, grace potter. tomorrow night, ellen jimmy fallon's happening right now. jimmy! [ cheers and applause ] ♪ >> announcer: and now, tonight's keynote speaker -- san antonio mayor julian castro. >> jimmy: thank you. [ cheers and applause ] thank you. my fellow americans, i stand before you tonight as a proud democrat. a proud latino, and a proud citizen of these united states. america is the land of opportunity, and my journey thus far has taken me all over this great country -- except arizona, they don't let me in there. there's actually a sign outside the state that says "you must be this white to get in." [ laughter ] but tonight, i want to tell you the story of my grandmother, victoria. she was a strong, proud, latina woman who could barely speak a word of english, kind of like the woman from "modern family," sofia vergara. along with my mother, victoria raised me and my twin brother, joaquin. it's true, i have a twin brother. and in case you're wondering, yes, sometimes we totally switch lives for a day just so screw wi