Lizzo for sure. Also the song (smile) by Lil Phag. It is harder to find happy songs than sad or angsty songs, so Lizzo is the biggest source of that for me.
i just recently fell into the black hole of BTS... there is no getting out. I suggest starting with Dynamite. That will put you immediately in a happy mood
Don't Stop Me Now by Queen, Radio Ga Ga by Queen, Bohemian Rhapsody (everybody knows that song ), Under Pressure by Queen ft. David Bowie
Basically any Queen song apart from Freddie's last ones which were particularly depressing because he knew he was dying.
Mr. Brightside - The Killers.
Gold - Spandau Ballet
I have a couple of go-to songs when I want to feel happy. Maybe you'll like them too.
1. Octopus's Garden - The Beatles
2. Ob-La-Di, Ob-La-Da - The Beatles
3. Crazy Crazy Nights - KISS
4. Mr. Blue Sky - Electric Light Orchestra
5. Have You Ever Seen The Rain? - CCR
They're rock but not that heavy soooooo yeah. Have fun!
New soul - Yael Naim
Pumped up kicks - acoustic
Shamans harvest - anything
Ben Caplan - Down to the river - YouTube
Jelly roll - Sunday morning, cowboys
Lemme Kilmeister nice guy - ACOUSTIC(youtube)
Griz - Can't hold me down
Uncle Lucia's Keep the wolves away
Rival sons keep on swinging