Give some stream of consciousness and then the answer. "Lyin' Eyes" is a song written by Don Henley and Glenn Frey and recorded in 1975 by the American rock band the Eagles, with Frey singing lead vocals. It was the second single from their album One of These Nights, reaching No. 2 on the Billboard Hot 100 chart and No. 8 on the Billboard Country chart. It remained their only top 40 country hit until "How Long" in 2007 -- 2008.

Answer this question: who was the lead singer of lyin eyes?
The relevant information is: "Lyin' Eyes" is a song written by Don Henley and Glenn Frey and recorded in 1975 by the American rock band the Eagles, with Frey singing lead vocals.
Therefore, the answer is Glenn Frey.