Songs I specifically hunted down after hearing them in commercials:
"Theme from Harry's Game" by Clannad
"20th Century Boy" by T-Rex
"Boy Or Girl" by Astrid
"If I Knew Then" by the Small Faces
"Are You Gonna Be My Girl" by Jet
In most cases, the songs led me to whole albums. In fact, commercials are my main source of new music.
My first post on this site:
Right on spcook...love the T-Rex and Jet songs (that was for one of the cell phone companies back in '06 I believe.
Using your header, Songs I specifically hunted down after hearing them in commercials:
"Horndog" by Overseer (Mitsubishi)
"Days Go By" by Dirty Vegas (also Mitsubishi)
"Molly's Chambers" by Kings of Leon (Volkswagen)
"Pink Moon" by Nick D"ake (also Volkswagen: agree with the posters that spoke about the entire connected mood of the song with the visuals of the commercial)
"Family Affair" by Mary J. Blige for Propel Water (this is a awesome song, surprised it's not mentioned more in this thread)
and the one that finally led me to find and join this site
"Slither" by Velvet Revolver (Guitar Hero lll) (had found this in earlier searches but was playing around with that search again and found this Nirvana site - pun sorta intended
NOW...after having read through this whole thread and all the great posts...I'm doing my part to bump this up...AND will have LOTs of music searching to do over the weekend!!