Mixing up famous folk while interviewing them is a lot more common than you think. Some people don't have the time to properly prep for interviews and well, some people are just eejits.
This gentleman who works for a US cable station made a right balls of his interview with Oscar nominated actor and general bad ass Samuel L. Jackson - by thinking he was star of The Matrix and CSI, Laurence Fishburne. Jackson takes the piss, but he really can't hide his disgust and in fairness it's tough to blame him.
Something tells us the chap won't be covering the red carpet for E! anytime soon.