Ian ‘Molly’ Meldrum has publicly apologised for his onstage antics at Sir Elton John’s Melbourne concert, blaming a faulty belt buckle for ‘accidentally’ mooning the audience.

Molly was at the Farewell Yellow Brick Road tour when Elton paid tribute to Molly, labelling him as a “national treasure” before thanking Molly for his “love and loyalty” over the years.

Meldrum managed to make his way onstage and stood next to Elton and his piano as he performed.

He then stunned the audience when his trousers dropped, exposing his rear end.

Meldrum spoke to the Herald Sun, where he explained that Sir Elton had no idea he would make his way onstage.

“I feel terrible if any of the security people get in trouble. The whole thing was 100 per cent my idea – no one else knew what I was doing. Elton might have been singing The Bitch Is Back but it was more a case of The Idiot is Back,” he said.

He continued to say that he “shouldn’t have crashed Elton’s show. As for my performance being more revealing than it should have been … well, at the start of the night, my belt buckle broke and my pants were already falling down. And on stage, one thing led to another,” before dubbing himself “a naughty boy, who needs a new belt.”