The Styrofoam Heads were a big part of the Flamingo channel. They were supposedly Albert's imaginary friends.
On October 15th, 2019, UGC-user DieSoft made a Felipe (one of the styrofoam heads) hat in collaboration with Albert for 50 Robux. The hat has become very successful being the 2nd most bought UGC hat (not counting Cartoony Santa since that's off-sale) and having 61k favorites as of January 22nd, 2020.
Here is a list of every single syrofoam head:
A picture of Overlord.