This year, the Muv-Luv anime series is celebrating their 20th anniversary, so for this special occasion they hosted a talk-show during which they featured Kumi, as one of her songs, Go to the top, was the opening for one of the adaptions.
You can watch the full show dubbed in English here: https://youtu.be/yIPDPs3eAv4
Or in Japanese here: https://youtu.be/3EEoc1QAqSA

If you just want to see when Kumi is speaking with English dub, watch the video below!