Ricky Martin is guest starring next month on Glee as a substitute Spanish teacher at McKinley High.
But Adam Lambert says he wants to appear on the Fox hit simply as himself.
'I want to just be me,' Lambert tells The Hollywood Reporter. 'Why do I have to be a fictional character?'
Lambert says he is a fan of the show because it 'really paints a picture of what it’s like to be an arts kid in high school.Glee is really irresistible - it's charming.'
The openly-gay singer was as not originally a fan of the show which has several gay characters including students played by Chris Colfer, Naya Rivera, Darren Criss and Grant Gustin.
'When Glee first came out, I was like, ‘I don't really like this show,’' Lambert says. 'But now I watch it... And you know what? I do think the show has an agenda, but I respect the agenda. I think it's a very brave agenda to try to push. I think that they're one of the few people that are doing it. So it's definitely one of a kind and very revolutionary in that way.'
There is no deal in place for Lambert to appear on the show, now in the middle of its third season. But the American Idol alum makes clear he wants it to happen.
'I think there were murmurs about it,' he says. 'Hopefully, maybe now that I have some new music, I could go on there.'
Lambert's second album, Trespassing, will be released in the U.S. on March 20 and a day earlier than that in the U.K. He revealed the cover of the album earlier this week to his more than 1.3 million followers.
Glee has reduced the number of guest stars it has had on this season to concentrate on the storylines of its regular characters. But Neil Patrick Harris and Gwyneth Paltrow have both won Emmys for their guest turns while Kristin Chenoweth has earned two nominations.
Other past guest stars have included Britney Spears (as herself), Olivia Newton-John, Josh Grobin, Cheyenne Jackson and John Stamos.