Hilary Duff's husband, Matthew Koma, has no problem poking some fun at another Disney Channel star — Joe Jonas. The 34-year-old singer-songwriter and producer had some fun with Jonas' new open verse challenge to his group DNCE's new song, «Dancing Feet.» Koma, posted his side-by-side video offering up a fun rap to one of the song's verses, posting the clip on Instagram. «Hey Joe, why'd you unfollow me on Instagram? That one time we wrote a banger for your other band.