Duets have always been a part of country music and superstars Tim McGraw and Toby Keith continue the tradition. R&B artist Nelly recently had McGraw join him in the studio for his single ""Over and Over"" and Keith's daughter will sing with daddy on his upcoming CD. We'll catch up with both singers to find out what to expect. After exploding onto the country scene in 2004, Big & Rich will soon follow up their successful ""Save a Horse (Ride a Cowboy)"" with ""Holy Water."" CMT Insider was on the set of the video and we'll have the lowdown on how the song was inspired. It's been 20 years of tours and hits for Wynonna, and the country star is setting out on a special anniversary tour to celebrate the milestone. We'll catch up with her at one of her shows and give fans a front row seat to all the excitement. Newcomer Katrina Elam isn't taking time to get her feet wet on a major concert tour. She's opening for fellow Aussie Keith Urban as he sets out on his first headlining tour sponsored by CMT