MTV’s award-winning documentary series True Life premiered nearly 21 years ago—it’s hard to fathom a world in which formative episodes like 2002’s “I’m Getting Plastic Surgery” and 2011’s “I Have A Hot Mom” do not exist—and to celebrate, the TV network is revamping the show. True Life becomes True Life/Now tonight, January 2 at 10 p.m., when the “reboot” examines a few young people obsessed with looking like the Kardashians.