To throw together your own personal "Best 9 of 2017" grid like the ones you may or may not have seen popping up on your feed a year's end, head to 2017BestNine.com on your phone, and plug in your Instagram handle. In a matter of seconds, the site will scan your feed to locate the nine most-liked posts from the year and arrange them in chronological order in a grid image that you can easily save to your device. You'll also notice that it displays the total number of likes from all your pics and videos from the year down at the bottom, though if you'd prefer to keep that a secret you can simply tap "Photo only version" and it'll disappear.
Just a heads up that if your account is set to private, you won't be able to get the grid. However, you can simply make it public for a minute, grab the grid, then set it back to private.