11/18/2016 5:50 AM PST BY TMZ STAFF
Mark won Person of the Year at the Vegas shindig. Before he was honored J Lo came out and the 2 performed their duet.
Let’s not forget he’s remarried — but during his speech, in what seems to have been damage control, Marc expressed his love for J Lo … as a sister! (For non-Spanish speakers it starts at 17 seconds).
Take a look Jennifer’s expression.