I always enjoy seeing one of the DS cast members break character, especially when it involves laughing. I noticed AM suppressing laughter more than once in that scene with JB.
Incidentally, for those who want to see a great example of suppressed laughter, check out the scene from 1795 in which Trask is interrogating Josette (MPI Volume 32, episode 2). KLS is very clearly on the verge of hysterics in this scene. That she managed to get through it is a testament to her talent.
As for AM's "wall of hair," I read an interesting account of her feelings towards the series during her last months on DS. In the book AMERICA ON THE RERUN, Lara Parker discusses how unhappy AM was, sometimes refusing to wear make-up or comb her hair for tapings. Lara did note, however, that AM "still looked ravishing."
Regards,
John