Rick Ross and His Maybach crew Sue By Promoter

Rick Ross, Meek Mill, Wale, Omarion and Stalley are being sued for allegedly bailing on a huge London concert .

The 5 rappers were supposed to perform at Wembley Arena in London on Sept. 12, 2012. After the promoter advanced a big chunk of the fees, Meek Mill threw a monkey wrench in the works by trying to postpone the concert. They negotiated another date but everything broke down and now the promoter wants all the money back.

Here's what each rapper got as a fee:

-- Stalley: $5,500
-- Omarion: $12,000
-- Wale: $35,000
-- Meek Mill: $40,000
-- Rick Ross: $100,000

The promoter also fronted $93,281.26 for flights and other expenses.