I'm not used to post this kind of things, but I think that we can make an exception for a red & black legend like Ricardo Izecson dos Santos Leite, better known as Kakà.
We loved him in during his days in a red & black uniform because he's been one of the classiest players - on and off the field - we've seen in our recent history and because he was part of one of the brightest moments of AC Milan.
Then the transfer to Real Madrid, where he struggled to find space in the starting XI due to injuries and a very high level roster in his role but he was able to show his skills even in that uniform.
Then the return in red & black.
I'm sorry for the low resolution of the photos, but I hope they'll be enough to relive these beautiful moments.