Meet the king of the sporting Twittersphere: Brazilian soccer star Kaka. The Real Madrid midfielder on Wednesday became the first athlete to amass 10 million followers on the social networking site. \"Tank youuuuu. To celebrate I\'ll make a twitcam\" wrote the 30-year-old Kaka, who at the last count had 10,012,862 Twitter fans. He\'s nowhere close to Lady Gaga and Justin Bieber - who each have more than 20 million followers - but it\'s not a bad haul for a player whose career appears to be on the wane after becoming a superstar in a golden six-year stint at AC Milan in Italy. He missed a kick from the spot during a dramatic Champions League semifinal second leg shootout against Bayern on Wednesday which denied Real a place in the final. Kaka describes himself as a \"Christian, husband and father who loves football\" and tweets in English, Spanish and Portuguese.