Apparently Stevie is booked on The Today Show April 2nd. There's no additional information on this appearance. We do know that Stevie's going to be in New York City after the last show of this leg of the Unleashed Tour (which is Toronto on March 26th) to promote her Soundstage Sessions CD and Live in Chicago DVD. She's appearing at Barnes and Noble, Union Square on March 31st for a CD/DVD signing at 7pm - then it's off to Late Night with Jimmy Fallon on April 1st.
As to whether these TV appearances are performance and interviews - we just don't know yet.