Jennifer Lopez (search) will return to guest star on the season premiere of "Will & Grace." (search)

The singer-actress will continue in the role of herself in an episode to air Sept. 16 on NBC. In last season's finale, Lopez was recruited by Megan Mullally's character to sing at her Vegas marriage to another guest star, John Cleese (search).

In this episode, Lopez returns to New York after her summer tour, where Sean Hayes (news)' character accompanied Lopez as a backup dancer.

Yet more guest stars are on the way for NBC's "Will & Grace." In the seventh season's second episode, Janet Jackson (search) will appear.