Actor Varun Dhawan and Ileana D'Cruz are happy that "Palat" and "Besharmi ki height", the numbers from their forthcoming movie "Main Tera Hero", hace become popular and admit songs are an important part of the film.Varun and Ileana, who will be seen promoting "Main Tera Hero" on the sets of "Dance India Dance Little Masters", talked about the popularity of the songs."Songs are such an important part of the film. I am very happy and surprised that 'Palat' became a big hit," Ileana said.Varun added: "Ileana and I often discuss about which is our favourite song. Yesterday we were at a radio station and they told us that 'Palat' was an instant hit, but 'Besharmi Ki Height' is slowly rising, people are requesting for that song. It is Ileana's favourite song."Directed by David Dhawan, "Main Tera Hero" also stars Nargis Fakhri and hits theaters April 4.Meanwhile, Varun is all set to reveal some college days secrets of grand master Mithun Chakraborty, who was his father David Dhawan's senior in college."Dada (Mithun) is my dad's senior from college and he used to rag my dad a lot. So dad has already told me two-three stories about him. So I am going to talk about Dada's college days," Varun said.