The group, made up of brothers Isaac, 22, Taylor, 20, and Zac Hanson, 17, were on Fred MacAuley's BBC Radio Scotland morning show.
MacAuley teased his American guests, who made their name with their cleancut image, over whether they were old enough to booze.
But the jibe prompted Zac to shout: ``We're f***ing rock 'n' roll stars.''
MacAuley tried to recover and jokingly said: ``I don't care who you are, if you say that again, I'll put you over my knee.''
Last night, Zac, who plays drums, said: ``It was a joke whichwentwrongand I didn't mean to offend anyone.''