Their MTV series is done, but ABC is hoping that Nick Lachey and Jessica Simpson haven't faded from the public consciousness yet.

On Monday, May 23, the network will unveil the celebrity couple's third variety-show special, "Nick & Jessica's Tour of Duty." As the title implies, the focus of the show will be on entertaining U.S. troops stationed overseas.

The two-hour special, which is running on the last Monday of sweeps, comes about two months after "Newlyweds: Nick and Jessica" ended its run on MTV. (Lachey is currently working on another series for the cable network that will focus on his music career.) Simpson and Lachey are still a go-to couple for the showbiz-news grist mill, although a number of recent reports have focused on the state of their marriage.

Both of the couple's previous specials have done pretty well for ABC. "The Nick & Jessica Variety Hour" drew close to 11.5 million viewers when it premiered in April 2004, and "Nick & Jessica's Family Christmas" brought in an audience of 12.4 million in December.

"Tour of Duty" will feature appearances by Willie Nelson, country stars Big & Rich, Jimmy Kimmel, Brian McKnight and Lachey's brother Drew. ABC also says Simpson and Lachey will deliver "emotional surprises from home" to some of the troops.