According to the I Need Air Songfacts,the song features Brooklyn-native singer/songwriter/producer Angela Hunte singing the hook. Hunte is best known for co-writing the original version of Jay-Z's hit, Empire State of Mind.
This song seems to seriously divide people. Personally I love it, I was quite surprised actually when I was the diversity of the comments. Possibly because I encountered it by watching a live video of it on the tube or something, dunno. (It must be wicked live, I can only imagine)
Oh btw, goran_p, you're absolutely right, the live version with Emeli Sande is breathtaking!
Electrify my body and your making me feel like im so electric everything you do is making me blow, blow, blow Dont know what to do about it cant see how I cant live without it all i wanna do is just know, know, know You suffocate my mind and now my atmosphere is crowded and you being here is making me blow, blow, blow You penetrate my space and now I'm looking out of place coz your making it hard for me, I need air!