The former X Factor singer spent 20 minutes outside the Pacific Quay studio meeting followers, posing for pictures and signing autographs.
Olly was being interviewed by breakfast hosts Jenny Cook and Des Clarke, who quizzed him on his third album, Troublemaker, which he hopes will be his best yet.
Cheeky chappie Olly told the presenters how nervous he was working with Flo-rida on his new single, and he chatted about how much he loves presenting the Xtra Factor with co-host Caroline Flack.
Jennie Cook said: "It was great to see Olly again. Every time we hang out with him he is even more successful and is always still as down to earth as ever.
"It was great to hear about his new album and plans for his upcoming tour next year and get some top quality banter from him for the Capital breakfast show."