We've finally made it to Nationals on ABDC after three grueling weeks of regional competitions. And though some dope crews have been left in the dust, the top nine are surely the best-of-the-best. Here are the chart-toppin' songs the crews will be rockin' to this week:

South:
SWAGGER CREW - Rihanna "Hard"
ROYAL FLUSH - Jay Sean ft. Lil Wayne "Down"
JUNGLE BOOGIE - Ludacris ft. Shawna "How Low"

East:
BLUEPRINT CRU - The Ting Tings "That's Not My Name"
SALTARE - Boys Like Girls "Love Drunk"
STATIC NOYZE - Jason Derulo "Whatcha Say"

West:
HEAVY IMPACT - Try Songz ft. Fabolous "Say Aah"
HYPE 5-0 - Black Eyed Peas "Imma Be"
POREOTIX - Kid Cudi "Day N Nite"

The bottom ranked crew in each region will have to face off in an ABDC-style battle to:

K$sha "Tik Tok"

[source]