"I have had a great time with Cardiff City and leave with outstanding memories from the last three years.
"There have been a lot of rumours and speculation about me over the past few weeks but I have always tried my best for Cardiff City.
"I'd like to thank Cardiff City and Dave Jones for developing my game, because I'm not the player now who came over from Feyenoord.
"But this is my dream move and I'm delighted to be signing for Celtic.
"It's a lot of money but it's so exciting because this is a chance for me to develop my game further.
"I've got the chance to play for a big club in Europe and I can't
Yours in Celtic
Clydebuilt