Two superstars, one from the world of sport and the other from the music industry, have got together recently for a special collaboration.

NBA All-Star MVP Kobe Bryant and Asian pop?star Jay Chou have recorded the song, "The Heaven and Earth Challenge", which was launched at the Staples Center in Los Angeles.

Written by Chou, the song encourages young people to be confident. And as expected, it has a sporting theme and both stars portray characters who challenge each other in a basketball match one-on-one.

Staying true to character, Bryant is very confident with his performance. "I love it... my part is talk, it's very relaxing and I did a great job, it must be A+."

Chou acknowledges that Bryant's winning spirit inspired him so much that the creative process was very easy.

"I wrote the lyrics and the song at one go. The cooperation between Kobe and I is unique and unrivaled."

The song will be used commercially by the soft drinks company Sprite. All proceeds from the online ring-tone downloads of the song will go to Project Hope, a charity dedicated to helping improve educational facilities in poverty-stricken areas in China.