Jake tends to have his eyes closed whenever he sings really emotional songs. Being a singer myself, it's kinda just something that happens a lot when you're really into the song.
Are Ты implying that Hedley is a single person? If Ты are, learn your facts first. If Ты just made a stupid mistake, then JAKE usually closes his eyes because it's emotional. Ты try not being moved, closing your eyes или getting Мурашки while listening to Hedley.