Vocals for 1 song

Hello I really enjoy your work. I especially like your song Ghost Stories. What is the price for a singing hook? Thank you.

Additional info:
I'm looking for a male singer. I don't have a hard deadline for this. The lyrics and melody are already written. I just need a singer.. I'm interested in hiring a pro who's worked on hit songs and have the budget for that. I'm an indie artist. I'd like to use your name as the vocalist. The song will be released commercially. . I need just the hook or chorus recorded.