It's "Float On" by Modest Mouse.
The song in the Zales commercial Nov. 2010 is Girl on my Mind by the Black Keys
Pomplamoose
New Seekers
Ben Griffith
Schwab - The Mole Man
"If It's Love" by Squeeze
Modest Mouse - "Float on"
The previous answer is referring to the 2010 Lincoln MKZ commercial. The song is Major Tom by Shiny Toy Guns. The song was originally done by Peter Schilling.
The question was who sings the song, not who wrote it.
Nouvelle Vague, they are a French cover band.
The song is The Secret Sun (2010 Single Version) by Jesse Harris.