Legendary singer Gladys Knight joins the ladies of THE TALK as a celebrity guest co-host, Wednesday, July 25, 2012 on the CBS Television Network. Sheryl Underwood, from left, Sara Gilbert, Gladys Knight, Aisha Tyler and Julie Chen, shown. Photo: Sonja Flemming/CBS ©2012 CBS Broadcasting, Inc. All Rights Reserved.

Actress Melissa Joan Hart is a guest on THE TALK, Wednesday, July 25, 2012 on the CBS Television Network. Sheryl Underwood, from left, Sara Gilbert, Melissa Joan Hart, Gladys Knight, Aisha Tyler and Julie Chen, shown. Photo: Sonja Flemming/CBS ©2012 CBS Broadcasting, Inc. All Rights Reserved.

The ladies of CBS's new reality dating series "3" - Rachel Harley, April Francis and Libby Lopez - preview the show live on THE TALK, Wednesday, July 25, 2012 on the CBS Television Network. Also shown, Gladys Knight, Aisha Tyler and Julie Chen, shown. Photo: Sonja Flemming/CBS ©2012 CBS Broadcasting, Inc. All Rights Reserved.

Celebrity trainer Gunnar Peterson leads the hosts in a heart-pumping workout as part of THE TALK's "Redo You" fitness series, Wednesday, July 25, 2012 on the CBS Television Network. Gunnar Peterson, from left, Julie Chen, Sheryl Underwood, Aisha Tyler, Sara Gilbert and Gladys Knight, shown. Photo: Sonja Flemming/CBS ©2012 CBS Broadcasting, Inc. All Rights Reserved.