With everything that’s gone down in the Justin Baldoni vs. Blake Lively legal saga, it’s wild to think these two were once on very friendly terms ... and this audio clip obtained by TMZ proves it. Take a listen -- in a voice note Justin sent Blake back in the early, pre-filming days of "It Ends With Us," he thanks her for sharing pics from her costume fittings, admitting he "legit got the chills" when he saw them and telling her she "looked beautiful." The timing is key ... this was way before