The boyband star claimed that his last jaunt with Blue involved a lot of "craziness" and "fire extinguishers".
Speaking at the launch of new reality show Don't Stop Believing, James said: "Hanging around with Lee Ryan on tour is very much an experience. I remember stories last time around that I am not actually going to repeat on Digital Spy because they would shock a lot of people.
"There was a lot of craziness and fire extinguishers being let off for some unknown reason. Lee would like going around squirting people with fire extinguishers. One night in Newcastle, Alan Shearer and all the Newcastle football players were in the hotel and Lee came down, running in with a fire extinguisher and soaked everyone including Alan Shearer.
"The last thing I remember is the security running after Lee down the corridor. Funnily enough we were told we couldn't go back to that hotel again."
Don't Stop Believing starts on Sunday at 7pm on Five.
> Click here for our full interview with Duncan James