This isn't a trailer but let's make an exception for two of the most recognizable faces on the planet.
Do we want to see Tom Hanks & Julia Roberts round two in Larry Crowne? The clip starts at about the one minute mark.
yes... well Julia is singing Gilbert & Sullivan in the clip. Plus, there aren't enough romantic comedies about adults and by adults I mean adults with functioning brain cells.
no...
maybe so... Tom is trying his damndest to sell it and admitting how awkward it is to sell your wares... though maybe he's pushing that a little too hard. It's not like you can be as cool as you wanna be by pretending not to be cool. It's too transparent. But I liked That Thing You Do! kinda, didn't you? I dunno. Both Julia and Tom both have similar weaknesses as massive stars go: the charm offensive. They have to walk a very fine line between barely selling it and letting their natural charisma do the work, barely selling it to the point that they just look like lazy/overconfident about their charisma which doesn't work, and overselling it because of the charm offensive.
It must be complicated to be a superstar.