Shahana Goswami, who plays Neil Nitin Mukesh's love interest in their upcoming film "Tera Kya Hoga Johnny", compares herself to a parasite and says she is at her best when her co-star is good.

"I'm like a parasite. If the actors that I am working with have good energy, I feed off it. My performance improves automatically and I am motivated even more to give it my best shot," Shahana told IANS over phone from Mumbai.