My song I don't know what it is?

ok so this song is a song that i like hearing kinda and it is not jennifer lopez on the floor (although i asked that question seconds ago and i got it!!!) so it goes "ooh oh oh oh oh oooooooooh"( that bit gets higher and higher) "oow oh oh oh oh oooooooooooooh"(and this bit gets lower and lower) and that repeats again and that the chorus (well thats all i hear) and i cant really catch the lyrics to the verses!! >:( and i think i can hear "on the floor" but once again its not jennifer lopez singing it!