Jailed rapper Max B has called on fans to sign a petition for his freedom after a court appeal was denied by a U.S. judge.

The hip-hop star was found guilty of felony murder and armed robbery charges in 2009 following his involvement in a 2007 New Jersey hotel incident, which left one victim dead.

Max B, real name Charly Wingate, was sentenced to 75 years behind bars for the crime, but he fought the conviction and mounted a defence case, which was later heard and denied by New Jersey's Superior Court Appellate Division panel in August (12).

Now he has launched a new campaign, called Pardon The Wave, in which he asks state governor Chris Christie and U.S. President Barack Obama to pardon his release and give him a second chance at life.

He tells AllHipHop.com, "We trying to get the petition on 'Pardon The Wave' signed. We trying to go at the governor; we trying to go at the president. To the people that's not signing the petition and screaming 'Free Max B,' that's not wavy. Do the right thing; sign the petition."

At present, Max B won't be eligible for parole until 2042.