For me, it's Walking on Sunshine by Katrina & The Waves. The cheerful lyrics does something to me and it always make me smile.
Is there a song that instantly puts you in a good mood?
There is a song called “Love Shack” by a band called the B-52s. When I hear it, I can’t help but move to it. Sitting down or standing up, it lifts my mood and I get moving.