The song is sung by the group Sleepy Rebels. the name of the song is Kaliedescope.
Small planet by Ferraby Lionheart If this is the shadow puppet commercial, the song is by Steve Martin and Bernadette Peters from "The Jerk". It's the beach scene.
"Kaleidoscope" by Sleepy rebels
The song used in the US Cellular commercial featuring people making snow angels is "Making Angels" by The Buffalo Skinners.
The song is "Small Planet" by Ferraby Lionheart. Hope that helps!
"Come Undone" by Greg Laswell
The song used in the DELL advertisement is called "Watch Us Work It" by DEVO.
It is in the same style as the Bernadette Peters and Steve Martin version in "The Jerk." But the one on the US Cellular commercial is a little different and is missing the waves in the background. It sounds very close to the version by MJ O'Sullivan on his album "All I Need Is This Guitar (that's all I need)" (an obvious tip of the hat to Steve and Bernadette). It's available on iTunes, Amazon, etc.
Respect (R E S P E C T) by Aretha Franklin
Piano Sonata No. 14 by Beethoven...most known as Moonlight Sonata
M.I.A. SINGS SWAGGER LIKE US
The answer for the commercial that aired in December of 2006 is: 13th Floor Elevators "You're Going to Miss Me" from 1966. The XPS commercial with the girls building the engine is Watch us work it by Devo