If I didn't know Mika and I heard Celebrate, it wouldn't "grab me." That worries me as a single. And I'm still shocked that this is a Pharrell project, because I don't "feel" Pharrell in the music, other than the fun part, which seems silly and the gap in music seemed awkward live for this part.
I had to play these songs over and over to like them and that scares me, because I adore Mika, I'm biased to like it 110% and then I struggled. So what will the casual listener think?