If your looking for a cheerful song for your First Dance then “You Make Loving Fun” by Fleetwood Mac might suit. This upbeat song (@32bpm) has a rhythm also suited to dancing “cha cha”.
Sweet wonderful you,
You make me happy with the things you do,
Oh, can it be so,
This feeling follows me wherever I go.
I never did believe in miracles,
But I’ve a feeling it’s time to try.
I never did believe in the ways of magic,
But I’m beginning to wonder why.
You, you make loving fun,
And I don’t have to tell you you’re the only one.
You make loving fun.