Chrissy Teigen has written a blog post to apologize for her past bullying tweets.The 35-year-old model took Medium on Monday morning to write a lengthy post in which she admitted to being a 'troll' and an 'a**hole' while insisting that she is'no longer that person.'She has come under fire in recent weeks for cruel posts on Twitter aimed at Courtney Stodden, Lindsay Lohan, Quvenzhané Wallis, and others.Teigen began by writing: 'Hi all.