'Glee' alumni Amber Riley performs moving tribute to friend Naya Rivera

Glee star Amber Riley has performed a moving tribute to her friend and co-star Naya Rivera, who died in July at just 33 years old in an accidental drowning. 

Riley, who starred with Rivera on the musical comedy series for years, performed her new song "A Moment," in tribute to her friend on Jimmy Kimmel Live! amid a photo...