H&M Designer Collaborations

For those who don't know: I'm a huge fan of H&M. Yes, I know I work for Zara, but I just love H&M Trend. And every time I'm very curious about the designer collaborations. Some of them were good, others didn't intrigued me that much. My favourite ones were Marni and Lanvin. Unfortunately I couldn't get anything from the Lanvin collection. So I couldn't resist when I saw this amazing H&M Fashion book with a huge review of all designer collaborations. Which one will be next?? What do you think? And do you have a favourite H&M designer collection? Let me know ;)