Kaka ushered in Real Madrid's latest "galactico" era as the Spanish club gave the Brazil player a rock star welcome with an unveiling in front of at least 50,000 fans. After president Florentino Perez introduced Kaka for the first time since his euro65 million ($92 million) acquisition from AC Milan, the 27-year-old playmaker shook his head in delight as fans chanted his name at the Santiago Bernabeu. "Today is a very special day for me. I'm very happy about this new step in my career at Real Madrid," said Kaka, who will wear the No. 8 shirt. "Viva Madrid!"

Kaka, who passed his medical earlier on Tuesday, and Cristiano Ronaldo are Perez's major summer signings as he bids to make up for a season without silverware. "There are no words for today, it's an unforgettable day," Kaka said through a translator. "All of this is a great honor and responsibility, and not a negative responsibility but a positive one. I hope we can win titles and many victories."

Kaka took the stage in front of a backdrop featuring photos of iconic Madrid players Alfredo di Stefano, Raul Gonzalez, Juanito and Zinedine Zidane. Accompanied by a young fan donning the first Kaka jersey, he subsequently did a tour of one half of the 80,000-capcity stadium to sign autographs and salute to the pumped-up masses. "He's very good," said 10-year-old Tony Castano, clad in a Madrid jersey. "I hope he can help the club win the league and Champions League this season." Hopes are high at Madrid, which failed to get past the first knockout stage of Europe's top-tier competition for the fifth straight season and lost the league to bitter rival Barcelona, which became the first Spanish club to win the treble last season.

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