Reply to DJing a graduation party? help

So I normally spin edm/party music etc. BUT Ive been contacted to DJ a highschool graduation party. When asked what kind of music to play the host said "You know like happy stuff, like bruno mars and stuff, no sad stuff". So I ask you all, what should I play?

The crowd is going to be some kids (highschool and younger) but I believe mostly adults, family to the student graduating you feel me.

What do you guys believe?