Nick Cannon showed off his new cover-up tattoo Sunday in Studio City ... and it's perplexing.
Cannon hit up the gym ... and on the way out we finally caught a glimpse of his crucifixion back piece -- but what's above Jesus' head has others scratching theirs.
We got 3 guesses ...
1) An angel
2) Some kind of bird
3) a cherub
Got a better guess? We'd love to hear it in the comments. So would Mariah Carey.