If you're thinking of the same one I am, it's the Hoedown from Copland's ballet Rodeo.
One classical Christmas song that has been used in a Garmin commercial is "Carol of the Bells." This song is a popular choice during the holiday season and its use in the commercial adds a festive touch to the advertisement.
"The Ride of the Valkyries" by Wagner
Palladio by Karl Jenkins
It's an original score.
Update from two other websites who got a reply from Wendy's. The song is "Yes" by Tim Myers and will be on an album of his coming out January of 2012. "love is all that i want, have, all that i see. love is rapping its arms around me."
Piano Sonata No. 21 first movement
I finally found it, enjoy:Debussy-Clair de Lune
O Fortuna from Carmina Burana
Lacrimosa movement of Mozart's Requiem Mass in D Minor
Beethoven- Classical- Piano Concerto No. 5 in E-Flat Major :D
LOVE STORY LOVE STORY LOVE STORY LOVE STORY