“We were the best-selling girl group in America of all time,” T-Boz says in the trailer, adding “no matter what we went through, we never questioned the love.”The 2-hour documentary also features interviews with Ahmir “Questlove” Thompson and rapper Missy Elliot, among others.After a long hiatus following Lopes’ death, T-Boz and Chilli reunited in 2014 and in addition to their 2017 album “TLC” they have continued touring regularly. “When you believe in yourself, that’s powerful,” T-Boz says in the trailer.