Thanks to TRuThOrLiEz1101 for this information.
The Universal Studios Orlando web site has information about The Ellen Show’s performances, including Jennifer’s on Saturday. The Ellen DeGeneres Show is taping at Universal Studios in Orlando, Florida on Friday and Saturday, instead of Ellen’s usual Los Angeles location. Jennifer Lopez will be performing at 3PM on Friday, and will be performing a song off “Como Ama Una Mujer” (probably “Que Hiciste”) and will also be performing “Waiting For Tonight”! More info at the link.