There are so many that instantly perk me up. The names coming to mind right now are - Daft Punk's
Get Lucky ('She's up all night to the sun, I'm up all night to get some, She's up all night for good fun, I'm up all night to get lucky'); The Foundations'
Build Me Up Buttercup (Baby, baby, try to find a little time and I'll make you mine'); and of course the ultimate one - Pharrell Williams'
Happy ('Because I'm happy, Clap along if you feel like happiness is the truth, Because I'm happy, Clap along if you know what happiness is to you'). There's this instant feel-good feeling when I listen to any of these