. >> we got journey, teddy pendergrass, marvin gaye, stevie wonder. >> barry white would go a long wayrtunity. >> but you know, it all works. we're here, like i said, to learn and to celebrate and decide the future. >> his real name is cassidy. >> by 18 he was partying with models is spinning-for-p diddy, even jammed at the president's birthday. >> it's a big ticket item? it's your top secret file. >> i guess so, sign, sealed and delivered. ♪ oh, baby here i am, signed, sealed, delivered i'm yours ♪ >> reporter: that was his too. he works with the campaign to choose the perfect song. with his trademark top hat and gold microphone, sitting always in the best seat in the house. >> this is like watching c-span, you must be the most well informed citizen. i wish every young person my age would actually be home and have this on tv. >> hold on a second. ♪ >> reporter: did you watch much of the republican convention? >> i watched some. >> what did you think of the music selection? >> i didn't think much. >> ouch. >> i'm just being polite. >> if there are doubts about whether the hope has fade