Revealing mistake: When Calvin falls out of the tree, he lands on the ground on his back. This would at least knock the breath out of him, but he is not hurt at all.
Revealing mistake: When the L.A. Knights play, the exterior shots show The Staples Center, but the interiors of the basketball arena were shot in the Great Western Forum, except for the locker room which was a stage at an LA studio, and still some other shots were taped at the All Star game, in Philadelphia.
Revealing mistake: When the three kids are sitting on the merry-go-round in the orphanage playground, look at the bars when the shot changes from Calvin to Murph. From the markings, you can see that they are the exact same bars, meaning that they decided to have the actors switch sections rather than the camera.
Revealing mistake: After Calvin steals the Ball from Vince Carter, you can notice a stunt double playing for Vince.
Answer: "Party Up" (by DMX)