The song at the end of Mike and Dave Need Wedding Dates that the two brothers sing together with Zac Efron playing the piano is
You Are So Beautiful
by
Joe Cocker
and the rap song that the four of them dances to together is
This Is How We Do It
by
Montell Jordan
As for the song when the fireworks starts exploding and going wrong that is one of my favorite song, which is
The Boys Are Back in Town
by
Thin Lizzy
