This page has info on the Free Tier from the 6th week of the Blockbuster Challenges in Fortnite Battle Royale.
Instructions
You can only find this free battlestar after unlocking the That's a Wrap Loading Screen.
This is done by completing six Blockbuster Challenges which entails completing all Weekly Challenges of any six weeks in Season 4.
Puzzle
This is the That's a Wrap! Loading Screen for reference:
Notice the battlestar on top of the food truck.
Solution
The spot is found at the SW part of Greasy Grove, on a red "Fork Knife" food truck. Climb onto the Food Truck and collect the Battlestar.
See screenshots and maps below to help find the location of the secret battlestar.
Screenshot
Map
Strategy Guide/Tips
- You can only locate the Week 6 star after you have unlocked the That's a Wrap! Load Screen.