The Loose Women presenter topped the group's list of the five most attractive women in the world in celebration of their latest track 'Hottest Girl in the World'.
JB told Top40 Appcast: "I actually saw Carol Vorderman recently at the British Grand Prix and she was on top form."
Beyoncé came second on their list, with Marvin Humes explaining: "She's an all-rounder. She's extremely good-looking, super talented, one of the most powerful businesswomen in the world."
JB placed actress Mila Kunis third on the tally, adding: "Family Guy is one of my favourite shows, I think she's a worthy number three."
JLS recently told Digital Spy that this year's X Factor boybands Union J and District3 will have to "find their own lane" if they want success after the show.
The group release their new album Evolution on November 5. Watch them chat to DS below: