Episode 145 of "Will and Grace"
s06e23 I Do - Part 1
Title: I Do - Part 1
Original Air Date: 04/29/2004 on NBC
Plot Outline:
Opting to forgo a picturesque fall wedding to elope in Las Vegas, Karen hops a plane to "Sin City" with fiancé Lyle and faithful friends Will and Jack – but when she bumps into vacationing superstar Jennifer Lopez, she asks J-Lo to sing at the ceremony. Meanwhile, Leo returns from Cambodia to meet up with Grace at the wedding, but their reunion is delayed by a freak design accident.
