Aha!! I think I now have it figured out how she did that. It is not a 1/2 square at the end of the usual sashing piece.
Make the usual friendship star block. Now to make the ones that go into the sashing. Cut the cornerstone and make 1/2 square triangles the same as the cornerstone. There will be a background piece the same size as those 1/2 square triangles to put between them. Is that clear as mud??
I was anticipating using the length of the friendship star and putting the triangle on that piece but this other solves it! Make as many friendship stars as you want but then cut the pieces for additional ones to use where desired as the sashings. Simple but a lot of seams to deal with.
This one I really like. Lots of stars and all different.