Arguably the most eagerly awaited tracks to be found on Queen's next album, 'Queen Forever,' are the official release of some duets Freddie Mercury made with Michael Jackson. However, drummer Roger Taylor says that Jackson's estate is currently holding up the proceedings.

“[Yes], if we could get a decision from the Michael Jackson estate, who seem to be, well, difficult," Taylor told the London Evening Standard. "William Orbit did a really nice mix of one of our tracks with Michael and I’m pretty certain that will be on 'Queen Forever.' But it’s been like wading through glue.”

Taylor and guitarist Brian May have been working with Orbit on completing unfinished music that in their vaults and debuted one of the possible songs, 'Love Kills,' this summer while on the road with Adam Lambert. While they hope to have it ready by Christmas, Taylor admitted that he's still a bit vague on the details.

“I’m not quite sure what’s on it yet," he continued. "We’ve got some great new tracks that haven’t been heard and there’s an interesting selection of older stuff.”

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