New Delhi, Popular Bollywood singer Sunidhi Chauhan has lent her voice to the title track of the forthcoming romantic thriller TV series "Ek Hasina Thi".Composed by Tapas and written by Manoj Yadav, the song is in the fusion space with a tinge of semi-classical Indian tunes.Sunidhi says the song has turned out to be "amazing"."Bollywood songs gave me a name and I am sure that this song for 'Ek Hasina Thi' will be much appreciated by the audience too," the singer, known for crooning hit numbers like "Beedi" and "Ainvayi ainvayi", said in a statement.