Inescapable also has it spot on - the tune really is stuck in your head and completely addictive. Its got a great balance of electro-pop and hip hop as well, and whenever she comes out with a new album, I get excited!
Get Low or Low, or even if you think they're cool at high school dances and thats it, then listen to Ester Dean, Drop It Low. She's like all of that but the FEMALE version. She's got some serious swag goin on, and although for the past year she's been mainly a songwriter hopefully that means she's keeping the best songs for herself!