"New Soul" by Yael Naim reached #7 (This song was selected for a Macbook Air commercial that aired in the US.)
"Get Silly" by V.I.C. reached #29 (He apparently knows Soulja Boy, which is why this song sounds so much like "Crank That Soulja Boy.")
"Fall for You" by Secondhand Serenade reached #21 (The son of a professional jazz musician, the band's name references the fact that all of his autobiographical songs are about his wife.)
Honorable Mention:
"Handlebars" by Flobots reached #37
"She Got it" by 2 Pistols reached #24