According to the lawsuit, Dru Hill and its thong loving frontman signed separate deals with Kedar Entertainment Group back in 2009 -- Dru Hill would release 2 albums, and Sisqo would also drop 2 solo albums.
Sure enough ... Dru Hill's “InDRUpendence Day" came out in 2010 -- and Sisqo's "Last Dragon" came out earlier this year. Neither burned up the charts, and the artists say that's because KEG got chintzy.
They say the label promised to spend $300k on marketing, but failed to buck up. In the suit, Dru Hill also says they got shorted on royalties -- never seeing a dime.
Sisqo and his DH mates are both suing to get out of their contracts and for a million dollars each.