Ellen and a glasses-clad Jenny discuss costumes, do vocal warmups and consider the (slim) possibility of Ellen becoming Jennifer's understudy.
In the second part Ellen introduces JLO on stage and gives us a glimpse into her amazing stage show.
Source 1: https://www.youtube.com/watch?v=aai7dDBNXBs
Source 2: https://www.youtube.com/watch?v=L1yUCxgOC5o