everyone, please welcome mo rocca!reat. everything's terrific. >> jimmy: i got to be honest, i was hoping to see mom backstage. >> yes. >> jimmy: your mom is not here. but you -- you moved her to new york city. >> yes, my brother and i moved our mother from maryland up to new york city into my building. she's right above me. actually, the thing i'm interested in how the crowd feels about having your mother right upstairs from you? [ cheers ] >> jimmy: i don't think so. >> see, i get -- i get two reactions. i get, oh, my god, that's so sweet. and i get, oh, my god, i hope she's not on the same floor. is she? and i love it. >> jimmy: is she proud of you? what does she think? does she see you on tv? what does she think of you? >> so my mother's from colombia, from south america. [ cheers ] >> bueno que bueno. and she watches everything that i do and her reaction is always which is she'll say, "pretty good. pretty good." [ light laughter ] which, i think she thinks means really good as opposed to like, eh, pretty good. >>

tonight, join jimmy and his guests -- chelsea handler -- mo rocca -- musical guest cheat codes

tonight, join jimmy and his guests -- chelsea handler -- mo rocca -- musica

tonight, join jimmy and his guests -- chelsea handler -- mo rocca --

geography wiz kids stepped into the spotlight, joined by bee moderator, our own cbs news correspondent mo roccarican samoa. one, two, three -- pago pago! >> reporter: getting a perfect score in the opening round was a surprise for first-time finalist alilan iranian. >> i don't know how the scoring works, so i am pretty much like what the heck. >> reporter: but for wisconsin native thomas wright, who last year tied for eighth, it was the end of a year-long journey. >> i know the expectations i need to set for myself. >> washington, d.c. >> reporter: at national geographic headquarters wednesday the junior g geeographers were treated like celebrities, showing off their global knowledge under intense pressure. >> buck island and buck island reef national monument are located just off the coast of which caribbean island? >> reporter: but with rocca behind the podium there was still room for a little levity. >> pranay, do i stand a chance of ever growing a mustache as full as yours? >> probably not. >> probably not. >> reporter: the ten finalists were eventually whittled down to just two. >> pranay

monitored by mo rocca. surprise. >> i don't know how the is. >> reporter: but for wisconsin native thomas wright who last year tied for eight. it was the end of a year-long expectations. >> i know the expectations i need to set for myself. >> reporter: junior geographiers were treated like celebrities showing off their global knowledge. >> buck island are located off coast of which caribbean island. >> reporter: with rocca behind podium there was still time for levity. >> do i ever stand a chance of growing a moustache as full as yours? probably not. >> reporter: the ten finalists were whittled down to just two. >> pranay varada from texas and thomas wright from wisconsin. >> they matched each other answer for answer. >> we move on to a tiebreaker. >> it took a to put varada at the top. >> what mountain system stretch more than 1,200 miles and separates the desert from the plateau. the correct answer is -- >> for wright, second place finish is something o be proud of. >> i set the goal as a top three finish