Chris Brown has been forced to pull out of an appearance at the Michael Jackson Tribute concert this weekend due to problems with his visa.

Organisers were sent into a panic this week when the Black Eyed Peas cancelled their scheduled performance, leaving them to draft in reknowned Michael Jackson fan, Chris Brown. While they thought they had their problem solved, Chris has been refused entry into the UK due to his criminal record for assaulting then-girlfriend Rihanna in 2009.

It has been suggested that Breezy will be performing via video link, however, a source told the Daily Mirror: "It would put a negative slant on the day. The family wants to make sure the show is a fitting tribute to Michael."

The concert has been plagued with problems since Beyonce pulled out from her video link performance and rock band Kiss being removed from the line-up following anti-Michael comments.

Is this concert Doomed?