Hosts Vick Hope and Sonny Jay also presented the show with him.
Hope appeared to distance herself from his comment, saying: "That song. Oh Roman, please, I didn't say anything."
Jay said: "I thought there [were] construction workers outside."
Kemp then went on: "BTS, we've asked them to come on the show and have a bit of a chat but we haven't heard much back yet.
"We're trying to make it work with their diaries. It will be interesting to see if they're willing to speak to me considering the articles that have come out in the papers.
"No, I wanna chat. It would be good to actually speak to them."