The actor, who plays teacher Will Schuester in Glee, performed with Leona at one of her London gigs last year, and said that he is hoping she will return the favour.
He told the Daily Star, 'I sang for her show, so that would be cool if she got on stage to help me with mine.
'I did Somewhere Over The Rainbow for her so she could come and do it for me.
'I am still in contact with her - I got an invite to her birthday party coming up in LA. She's going to be out there for that I guess. So I'm hoping I have the day off and hang out with her.'