Did i just misunderstood it or am i right?

[PsychoAnarchy666]

Do you have to get 3 stars on all tiers to get those special t-shirts or just get 3 stars on one specific or any tier? I saw on gtaseriesvideos video of the gun range the player received a pop up saying you got rewards for getting 3 stars on tier 3 or something like that witch i just did,got 3 stars on tier 3 but got nothing except the molotov being available for me to pick up in my bunker.