'Idol' Judge Accused of Stealing Dance Show

Randy Jackson isn't used to stealing the show -- but according to a new lawsuit, that's exactly what he did with "America's Best Dance Crew."

The Dawg and MTV are being sued by a guy named Dwight McGhee -- who claims the two powerhouses ripped off his idea for a reality show about a dance crew ... called "International Breakerz League."

According to the lawsuit, filed last week in L.A. County Superior Court, McGhee claims he pitched his show idea -- which he calls "uncannily similar" to ABDC -- to MTV back in 2004.

Fast forward four years later: ABDC premieres on MTV ... and McGhee is pissed, claiming he and MTV struck an "implied" contract when he pitched his concept.

Now, McGhee wants Randy and MTV to pay more than $2,000,000 for his trouble. Good luck with that.

No immediate comment from Jackson or MTV.