EXCLUSIVE: 'The Voice' coaches reveal who's the biggest diva of them all

Think you know everything there is to know about The Voice coaches? Think again…

The fab four -- Boy George, Kelly Rowland, Delta Goodrem and Joe Jonas -- came together in a fun game to give fans an insight into who's who of the group. Armed with headshots of each other, they had to answer a series of questions by holding up the headshot they saw fit.

Cue. The. Laughs.

You'll be surprised to know who the biggest name-dropper is of the group. Don't worry, we didn’t pick the answer either...

"I was using every [name] I got in the Blinds," admitted newcomer Jonas, 28.

Given George, 56, wasn't the new kid on the block anymore, the name-dropping novelty no longer worked for him.

"I ran out of names in the first season," the Brit singer said.

But spare a thought for poor Goodrem, 33, who chimed in, "I never had any names."

She did, however, come up trumps when it came to who the set favourite was -- all her co-coaches unanimously voting her as producers' pet.

RELATED: Delta Goodrem on Kelly Rowland: 'What a blessing to have found this beautiful friendship'

While Rowland, 37, said it's because Goodrem's "been there the longest, so I get it," George said it's because Goodrem is friends with everyone… and everything.

"It's like she knew everyone," said George of when they returned to the show this year. "It was like, 'Hi door, hi chair, hi ceiling.' She knew everyone, all the people on the cameras… and their relatives!"

Just don't get into a car with Goodrem, said Jonas. And he should know -- in 2012, she briefly dated his brother, Nick Jonas, 25, so they've hung out quite a bit.

RELATED: The Voice 2018: New coach Joe Jonas reveals he's 'going to tease' Delta Goodrem

"I've been in many cars with Delta. Trust me on that," said Jonas when asked who was the worst driver of the four.

But the question we were all holding out for was who's the biggest diva of the group.

While Jonas took the diplomatic route and didn't answer, Rowland and Goodrem both said George, who fired back with, "Delta's a diva in denial. Takes one to know one." Touché!

The Voice Knockouts continue tonight at 7:30pm on Nine and 9Now.