Nia Long recently participated in the viral "backup dancer challenge," and social media users are going wild over her moves.RELATED: Doin' Too Much? Larenz Tate & Nia Long's Recent Link-Up Has The Internet Calling His Wife A "Strong Woman" (WATCH)Nia Long Participates In The Viral "Backup Dancer Challenge"On Tuesday, October 21, celebrity trainer Jeanette Jenkins took to Instagram to share a clip from her apparent session with Nia Long and her friend Daphne Wayans.