Martina is joining R&B legend Gladys Knight and British soul star Estelle for the first installment of the show, which will stream live from Nashville at Tonight at 8:00 p.m. Eastern.  Martina adds that she’s hoping she’ll be able team up with Gladys and Estelle on a few songs.  The country star explains that collaborations are part of the plan for the show, but she’s not sure if they’ll actually come to fruition.

Martina McBride admits that performing live, especially for a show that’s being broadcast, still makes her nervous.  The country star tells “People” it’s exciting, but when “you know tons of people around the world are peeking in on it from home, you can start overthinking it.”  The singer is taking part in the premiere of the new online music series, “Skyville Live,” which debuts Wednesday night.  Martina adds that she’s thrilled to be featured on the show with Gladys Knight.  She says it’s “just crazy how great” Gladys is, explaining that after more than 50 years “she still sings like no time has passed.”  Martina also says she’s hoping to join Knight to perform her classic “Midnight Train to Georgia” on the show.