Shani and James leading no. 312b Restoration from The Sacred Harp (1991 Denson edition), at the eighth annual Golden Gate All-day Singing, 22 April 2012, held at the Potrero Hills Neighborhood House in San Francisco, Calif. and sponsored by Bay Area Sacred Harp.
I like watching more experienced singers help newer singers lead songs, especially when (as in this video) the more experienced singer makes it look like both of them are experienced singers.