Cee-Lo Green and Jack Black was chosen to sing the hollywood version of the theme song of Kung Fu Panda entitled Kung Fu Fghting.
Apparently, Rain also recorded his own version but got rejected by Dreamworks. I had a hard time understanding the lyrics when I listened to Rain's version. I think that was a factor when Dreamworks turned him down. He really needs to polish his english pronunciation. But kudos to Rain for the effort.
Philippines' Sam Concepcion, on the otherhand, was chosen by Dreamworks to sing Kung Fighting for its Asian release. Here's a peek of Sam's version when he guested in ABS-CBN's Sunday show ASAP.