Many who've purchased Thompson Square's self-titled debut album have track No. 3 circled as a favorite. 'Glass' is one of three neither half of the married duo had a hand in writing, but Shawna Thompson's vulnerable, quivering vocal leaves one to argue emphatically that she must have birthed the song.

Much like Lady Antebellum did with their first three radio singles, Thompson Square have slowly revealed the strengths of their female member. 'Glass' is the first time Keifer backs up Shawna, and the result adds another dimension to this already exciting act. The lyrics are merely better than average, but from Mrs. Thompson's lips they float through the air like a lonely snowflake, begging for safety and acceptance that is too easy to grant.

"We may shine, we may shatter / We may be picking up the pieces here on after / We are fragile, we are human / We are shaped by the light we let through us / But we break fast / 'Cause we are glass," she sings during the chorus.

Songwriters Ross Copperman and Jon Nite are not yet household names in Nashville, but their use of imagery and metaphor is just short of award-worthy. This is Shawna Thompson's moment, however, and she owns it.

"I'll let you look inside me / Through the stains and through the cracks / And in the darkness of this moment / You'll see the good and bad / But try not to judge me / 'Cause we've walked down different paths / But it brought us here together / So I won't take that back," she sings as her husband supports her during the second verse.

Look for Thompson Square to perform the song when they hit the road with Lady Antebellum, beginning this month in Tulsa, Okla.

Listen to Thompson Square, 'Glass'