"Push it to the Limit" by Corbin Bleu reached #14 (You'll probably recognize Bleu from the "High School Musical" series)
"Here (In Your Arms)" by hellogoodbye reached #14 (They recently toured with Hanson and may be releasing a new album soon.)
"The Way I Live" by Baby Boy da Prince reached #21 (Originally he was just "Da Prince," but then his manager called him Baby Boy and it stuck.)
"Pop Lock and Drop It" by Huey reached #6 (Nelly refused to work with him on his debut, so he wrote a couple of diss tracks in retaliation.)
"Party Like a Rockstar" by Shop Boyz reached #2 (To fund their interest in music, the Shop Boyz worked on cars during the day.)
"Lean Like a Cholo" by Down AKA Kilo reached #34 (Down is the son of illegal immigrants. Under the alias Kilo, he raps mostly in Spanish)
"Duffle Bag Boy" by Playaz Circle reached #15 (The rap duo lived in the same housing complex as Ludacris before they broke into the biz.)
Honorable Mention:
"Boston" by Augustana reached #34
"A Bay Bay" by Hurricane Chris reached #7