Conversation so far:
When did Adam Lambert appear on American TV series The Voice?
Adam Lambert performed a cover of Cher's Believe as a duet with Katie Kadan on the December 17 finale of the seventeenth season of The Voice.
What is wrong with Adam Lambert's voice?
Critics, celebrities and colleagues have been outspoken in their praise for Adam Lambert's vocal command.

Question: Could you tell me more about his voice?
Self-contained rewrite: Could you tell me more about Adam Lambert's voice?