Kollywood actor Silambarasan aka STR is all set to enter Bollywood without delay. The opportunity knocked on his door as the track, 'Evandi Unna Pethan', from Vaaanam became a chart buster. Simbu was asked to act in a music video of the song. The song was scored by Yuvan Shankar Raja. The actor himself will sing the Hindi version. The music album will be directed by Ahmed Khan and is expected to be soon popular across India. Vaanam is marketed by Cloud Nine Productions and will hit the screens world wide on April 9.