TLC's T-Boz -- I'm Adopting A Baby!!

T-Boz is about to be a mom two-times-over because she's adopting a kid.

According to legal docs obtained by TMZ, the TLC member spilled the beans while getting grilled by an attorney in a $40 million lawsuit over a TLC movie.

Boz was asked if she had any communication regarding the lawsuit with group-mate Chilli and she said their only contact was when they shared the baby news.

This will be T-Boz's second kid ... the 45-year-old has a 14-year-old daughter with rapper Mack 10.

T-Boz told Larry King in 2012 -- after the earthquake-- she was interested in adopting a child from Haiti.