The Bye Bye Bye hitmaker's wife annually takes part in the Goofy Challenge at Walt Disney World in California, where athletes run a half-marathon followed by a full marathon the next day, and when Kelly fractured her foot in November (12), Fatone started training so he could step in and take her place - and he finally conquered the feat over the weekend (12-13Jan13).
Alternating between intervals of jogging and walking to complete the 13.1 mile (21 kilometre) race on Saturday (12Jan13), he says, "It really wasn't that bad," but he admits Sunday's (13Jan13) trek was much harder.
Finishing in just over six hours, he tells People.com, "I never thought, 'I'm not going to do this,' but I did think, 'What am I doing?' Your body can do so much if you mentally prepare. I really do feel like I can do anything now. It's a great feeling."