Deadline reported.Friends and family took to social media to mourn the “All My Children” actress, with Blair’s “Chorus Line” co-star Baayork Lee writing: “I am very sad to say my Sagittarian sister Pam Blair has gone to play with her [‘A Chorus Line’] colleagues among the clouds.” In a Facebook post, Lee — who shared a birthday with Blair — continued that the pair “always wrote to one another no matter where we were on that day.”Lee recalled Blair bringing the “house down every night” with her performance of “Dance: Ten, Looks: Three” from “Chorus Line.”“You are free now Pammie so dance, dance, dance among the stars,” Lee concluded her post.Born in Vermont on Dec. 5, 1949, Blair started her career as a stage actress and dancer.