Is there room on TV for yet another singing competition?  Kelly Clarkson, Robin Thicke and Lionel Richie -- who are already appearing on The Voice this season as advisers -- have signed up for a new ABC series called Duets, as has Sugarland star Jennifer Nettles. The series, which will premiere on ABC this summer, will find the four stars traveling across America to find singers to be their duet partners.  Every week, the celebrity and one of their "discoveries" will perform in front of a live studio audience.  The winner will land a contract with Hollywood Records. In a statement, Kelly said, "The simple fact that I get to go out and find two people I believe in, sing with them every week and help them accomplish their dream is an amazing thing I can't wait to be a part of."