Hey.. I know the commercial you're talking about. The song is 'Well Adjusted' from their new, upcoming album Before Everything and After. Hope this helps.
>> whats the name and or bands name in the new Diet Pepsi commercial? Its the commercial with the kid at the concert in the mud and he looks over and sees his dad next to him.
> the band is MXPX, in the full length commercial, you see the banner that says MXPX behind them. but i don't know what song yet.