Song at the end of Mike and Dave Need Wedding Dates

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