PINK HIT WITH $36,000 ROYALTIES SUIT

P!nk forgot the little people on her way up the ladder ... at least according to a new lawsuit accusing her of cheating her ex producers out of $36k in royalties.

A company called Specialists Entertainment filed docs in NYC last month, claiming P!nk signed a deal with them, and Thunderstone Productions, to produce on her debut album back in 1999.