It's called Eat You Up. For those who haven't heard of it, check it out: YouTube - BoA - Eat You Up MV (Cha Ver.)
Anyways, I personally think that it's a great song. My review:
Beat: 5/5.. it's a great song to dance too and extremely catchy.
Tune: 4/5. A bit repetitive, but that's okay. It adds to the catchiness!! I can just sing the chorus all day long.
Lyrics: 2/5.. not the best and kinda trashy, but at least they make sense and aren't just a bunch of profanities and slurred words. Hey, not many people today care much about lyrics anyways~
Vocals: 3/5 She's had much better songs that showcase off her beautiful and unique voice (YouTube - BoA - Everlasting (Korean Version Subbed)). But this is a dance song, and it's not like people really care that much about vocals anymore. lol but anyways, vocals don't matter much in dance/pop (or hip hop and rap for that matter).
Choreography (I guess I should mention it): 5/5. EXCELLENT. Choreographed by the guy who worked with Janet Jackson, Justin Timberlake, Mariah Carey, Omarion, etc.- Misha Gabriel. BoA's dancing and her dancers are pretty hot too. =]
Overall: 4/5. A great single and a must-buy on iTunes (especially since it recently got upgraded to a higher quality AND it's only 0.99! lol).