In Fall 2008, ABT issued a press release announcing Osipova as a Guest Artist for the Spring 2009 season. In November 2008, ABT posted her performance dates to its website for one Giselle -- it was one of the famous back-to-back Giselles with Cojocaru -- and two for "La Sylphide," with one performance between Anianashvili's on Thursday and Part's on Saturday night. That I remember clearly, because I originally had a ticket for all three. Eventually, Hee Seo was announced for the Friday performance, then she was switched to the Saturday matinee, and Part did Friday and Saturday night.
Yuri Burlaka took over as AD in 2009, and in Spring 2009, he pulled Osipova from her Friday night performance to dance with the Bolshoi at the Kennedy Center tour of "Le Corsaire." He gave an interview which was on video, where he wagged his finger at ABT for their audacity in casting Osipova without his permission. She pulled from at least the closing performance of the tour, a Sunday matinee, because she was hospitalized earlier that weekend, which I also remember, because I was among a bunch of people who had made the trip down from NYC to see her, and there was major grousing in the lobby. (I was flying out of DC the next day, but I would have stayed in NYC another day had I known, especially since the Bolshoi had to cut off much of Act III to keep it under three hours.)
Having attempted to chase her down in an epic fail, and following her history since, I will never again make plans around seeing her.