Asked if she knew 'Tik Tok' would become a big hit, Kesha said on 'The Jennifer Hudson Show': "No, oh my God! "When I was writing 'TiK ToK', it was weird, because the dumber it go ...

Our collective playlists sound a lot like it's 2009. And our vibecession might be to blame. "Recession pop" is back. Here's what to know.