Shorten was invited to take part in Fitzy and Wippa's weekly rap battle on Friday and the Labor leader took the opportunity to have a fun dig at his opposition.

While Shorten struggled to stay with 50 Cents' In Da Club background beat, he was not short of material having a light-hearted swipe at several people including Defence Minister Christopher Pyne and Prime Minister Malcolm Turnbull.

Shorten was even able to throw in a mention to former Prime Minister Tony Abbott.

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"I’m Bill Shorten, I’m head of my pack, the Sydney Swans gave Fitzy the sack," Shorten began as he set the tone for the rap.

"Wippa’s not bad, but just a waste of my time, you boys will be crying by the end of my rhyme.

"Each day I listen to you fellas whinge and whine, I’d rather go to Question Time with Christopher Pyne.

"Our economy’s in debt, but Malcolm’s just chillin’, hey Macolm can you lend us a couple of million?

"Will I rap again, it’s anyone’s guess, but there’s more chance of Tony Abbott voting Yes.

"I’ve nailed the rap, I’m the cat, you’re the mouse, the tables have Turn-bulled, now it’s Shorten’s house."

Before the battle was over, Fitzy was able to throw in a few lines of his own and introduced a surprise guest.

Fitzy invited 2GB morning show radio host Ray Hadley into the battle, and after claiming he had been warming up for hours.

Hadley was eventually named the winner.