We’ve seen instagram on BlackBerry 10 before, but in the form of an old android port. Someone at crackberry’s forum has scored a much newer leak of the app for the BlackBerry Z10. The new leak sits at version 3.4.4 (The old one was version 1.0.310). It’s still and android port, and a major issues from the old port–keyboard get’s crazy when you want to comment on a picture–seems to be present still, but everything else works much better and smoother. You can even sign up for new accounts now and log in without any work around.
If you want to give it a go, you can download it from here and side load it onto your device using these instructions.