I've been and will be a massive (stainless steel) fan of Hip Hop. So a great amount of the all-time awesomest happiness-enticing songs come from that genre. Not restricting my tastes to a genre, or a handful at that though.
Lately I've gotten into artists that are phenomenal singers, skill-wise, and use those skills (to step) correctly, so I'll stick to them to not end up posting 200 videos for starters. Adele has been on heavy-rotation for the last couple of weeks (amongst others).
and when it comes to singing, you can't forget Cee-Lo: