Hi ive heard this song a few times on the radio but they never say what it is!

Its by a female and the chorus is basically Hello hello hello.
Its quite midtempo, I think some of the lyrics are something about a 'tongue, a thousand lies'

Only one I can think of is Hello by Martin Solveig? (it has a female vocalist)

Is it "What You Want" by Evanescence?

OP if you mean the one that BBC1 sometimes uses during their trailers, it's definitely the Martin Solveig tune