Here are some facts about Rainbow Stars, a pony who made her first appearance five years ago from today:
* Rainbow Stars is the third background pony that has Kelly Sheridan as her voice actress, following North Point (Season 5) and Jasmine Leaf (also from Season 7). She is also the second background pony unicorn who has done so.
* She is the sixth background pony who has Nicole Oliver as her voice actor, and the third background pony unicorn to do so, following Twinkleshine (Season 1), Autumn Gem (Season 3), Scarlet Heart (Season 6), Indian Summer and Raspberry Vinaigrette (both from Season 7).
* Rainbow Stars is best known for her argument with Crusoe Palm in Triple Threat, which has became one of the most infamous scenes from that episode.
* She holds the record for the longest number of episode appearances out of all the ponies whose first appearance was Brotherhooves Social, with 30.

You can find more facts about her here

Next ponies will be Twinkleshine (Season 1) and Spoiled Rich (Season 5).