Sara Blakely, Spanx founder, buys Olivia Newton-John's "Grease" pants

Only on "CBS This Morning," we are revealing the anonymous buyer behind Olivia Newton-John's famed black satin pants from "Grease." Spanx founder Sara Blakely bought the pants for more than $162,000, and also bought a custom "Pink Ladies" jacket presented to Newton-John by the movie’s cast and crew. Blakely joins "CBS This Morning" to share the story behind her purchase.