Wiz Khalifa is suing concert promoter It's My Party for pulling the plug on a performance at Virginia's George Mason University at the last minute.

According to TMZ, Wiz claims that he was promised $85,000 plus a cut of the profits. But he says the real damage was to his reputation, and so he wants a cool million to make up for it.

It's My Party says it didn't come close to filling the 7000-seat arena and that execs never signed off on anything -- so it's not obligated to pay a penny.

Source: TMZ