StayAwakeTV1 gives some background:
Chris Stark is the 'doofus sidekick' guy on the Scott Mills radio show on BBC Radio 1 - they always have him doing dorky things like awkward interviews,or eating super-hot chili peppers, or singing show tunes in crowded restaurants. What's more, this kind of interview is WAY more entertaining for all concerned than 99% of celebrity promo junket interviews usually are.
Image: Mila Kunis talks to Chris Stark Courtesy BBC Radio 1