Bomboleo -- Gypsy Kings
Island Song-- Zac Brown Band

"The Mighty Quinn" by Manfred Mann

https://www.youtube.com/watch?v=liIQLIx2Onw

The Beatles: Mister Moonlight, Here Comes the Sun
Rolling Stones: Mother's Little Helper
Kelly Clarkson: What doesn't kill you makes you stronger

Really? "Truly, infectiously happy"?
More power to ya, but that's a bit of an odd list.

Rose Falcon: Up Up Up
Pointless song that's pretty much the oral equivalent of cotton candy, but so catchy and exactly what the thread asked for - infectiously happy.

The Beatles: Mister Moonlight, Here Comes the Sun
Rolling Stones: Mother's Little Helper
Kelly Clarkson: What doesn't kill you makes you stronger

Anonymous wrote:Fall from Grace of God (or something like that) The Pogues

Celebrate

Yes!!! And the Fairytale of New York, also by the Pogues. Really awesome songs that I'd almost forgotten....

http://www.youtube.com/watch?v=I9zpnLBtwwg

Cardigans - Lovefool

Barbie Girl- Aqua
https://www.youtube.com/watch?v=ZyhrYis509A

On top of the world - imagine dragons

Bodhisattva, Steely Dan

Awesome God by Hillsong
Little Plastic Castle by Ani DiFranco
Scarlett Begonia by Grateful Dead
Jolie Blon by L'Angelus

I'm All Right -- all I can see is the little gopher dancing at the end of Caddyshack

War - Low Rider

http://www.youtube.com/watch?v=6A0U7jakUY8

Thomas in da club:

https://www.youtube.com/watch?v=qjVC_jrHcHI

" I can see clearly now "

Johnny Nash.
Though Jimmy Cliff and Hothouse Flowers also have done great versions. Hothouse Flowers especially if you want a big glorious ending, and maybe want to mash the accelerator down till you're exceeding 90.