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The camp Queen singer had secretly agreed to record a duet with the king of pop.

It was going to be included on Jacko’s legendary album Thriller.

But Freddie, who died in 1991, had no idea the singer was so eccentric and kept bizarre pets.

He freaked out when Jacko, who passed away three years ago, brought the animal into the studio in Miami to sit with them.

In a new BBC1 documentary, a friend of the Queen rocker reveals: “Freddie and Michael got on well until I got a call from Freddie saying: ‘I’m in Miami, dear. Can you get over here? You’ve got to get me out of this studio.’

“I said: ‘What’s the problem?’ He said: ‘Michael Jackson keeps bringing his pet into the studio and I’m not used to recording with a llama. I want to get out.’”

Later Freddie admitted: “If we’d finished the track it would have been on Thriller! I missed out.”

Imagine: Freddie Mercury The Great Pretender is on BBC1 next Tuesday at 10.35pm.