#1
The Ditty Bops

Personally, I really enjoy the Ditty Bops. I am very into jazz and ragtime and I feel like these girls are really bringing ragtime back with a great vibe and approach to it.
He's a Pirate
#2
I love these guys ... er ... girls.

Saw them on MySpace. Love it, love it, love it.
#DTWD
#3
My Audioscrobbler recommended them to me a couple weeks ago. They aren't bad. They seem like a bit of a novelty, though.