Leslie's voice has added that extra something special to many different projects. Here are just a few...
| Year | Artist | Album | Credits |
| 1997 | Lee Ann Womack | Lee Ann Womack | Vocals (Bckgr) |
| 1998 | Pam Tillis | Every Time | Vocals (Bckgr) |
| 1998 | Randy Travis | You And You Alone | Vocals (Bckgr) |
| 1999 | Mindy McCready | I'm Not So Tough | Vocals (Bckgr) |
| 1999 | Doug Stone | Make Up In Love | Performer, Vocals (Bckgr) |
| 1999 | Lorrie Morgan | My Heart | Vocals (Bckgr) |
| 2000 | Various Artists | Gram Parsons Notebook: The Last Whippoorwill | Performer |
| 2000 | Vince Gill | Let's Make Sure We Kiss Goodbye | Vocals (Bckgr) |
| 2000 | Jim Lauderdale | Other Sessions | Vocals (Bckgr), Harmony Vocals |
| 2001 | Billy Gilman | Dare To Dream | Vocals (Bckgr) |
| 2001 | Various Artists | January/February 2001 Guide | Performer |
| 2001 | Jeff Carson | Real Life | Vocals (Bckgr) |
| 2001 | Danni Leigh | Shot Of Whiskey And A Prayer | Vocals (Bckgr) |
| 2003 | Blake Shelton | Dreamer | Vocals (Bckgr) |
| 2003 | Various Artists | Livin', Lovin', Losin': Songs Of The Louvin Brothers | Performer |
| 2003 | Neal McCoy | Luckiest Man In The World | Vocals (Bckgr) |
| 2003 | Vince Gill | Next Big Thing | Harmony Vocals |
| 2003 | Terri Clark | Pain To Kill | Vocals (Bckgr) |
| 2004 | The Woodys | Teardrops & Diamonds | Gut String Guitar |
| 2005 | Trisha Yearwood | Jasper County | Vocals (Bckgr) |
| 2005 | Terri Clark | Life Goes On | Vocals (Bckgr) |
| 2005 | Various Artists | Texas Fed, Texas Bred; Redefining Country Music, Vol. 1 | Harmony Vocals |
| 2006 | Jim Lauderdale | Country Super Hits, Vol. 1 | Producer |
| 2006 | Vince Gill | These Days | Harmony Vocals |
| 2006 | Terri Clark | Pain To Kill [Australian Tour Edition] | Vocals (Bckgr) |