Actress Bipasha Basu has been bowled over by the"Tum Ho" song from Ranbir Kapoor starrer "Rockstar" and says it mesmerises her.



The song is sung by Mohit Chauhan.

"This song 'Tum Ho' just keeps mesmerising me more n more everyday! Soooo beautifully sung by Mohit Chauhan," Bipasha posted on micro-blogging site Twitter.