Call for Summer Music Suggestions

I spent most of my day reviewing and revising a PowerPoint deck for a meeting (important) I'm co-facilitating on Monday.  When I need to zone out and get large chunks of work done, especially when it comes to editing, revising writing, I turn on the tunes.  I have roughly 4000 songs loaded onto my iPhone; this is the equivalent of a few days of playback.

I had an epiphany today while working: the majority of the songs I own are depressing.

Dylan, Cash, Tina & the B-Sides, Ray Lamontagne, Tom Waits, the Indigo Girls, Gin Blossoms, Counting Crows... the vast majority of it is simply born from sadness.

This isn't necessarily a bad thing.  Tons of the greatest art has been born from the greatest tragedies. Heck, most of anything I've created that's worth something at all has its roots in the most challenging moments of my life.  I enjoy a good song (or poem or painting) that deals with difficult emotions.  That is one of the ways I process feelings.

But this is summer.  And I'm working.  And I don't want to be pulled down those kinds of rabbit holes while the sun is shining (and I'm stuck inside).

I'm looking for suggestions.  Please recommend something upbeat, positive, but not too pop/bubblegum.

Who are you listening to this summer?  Who should I be listening to? 

(Your suggestions don't need to be current, but that helps.)

My appreciated.