He'd definitely show up to your party in the best shirt ever created.
Resist the urge to ask if you can borrow it.
He would almost certainly BYOB.
He'd pick out some righteous party tunes.
His dance moves would most definitely get things going.
I'm sure he'd do his world famous dog impression if you asked nicely.
Or his impression of a really nice guy.
View this video on YouTube
You have to use your imagination.