Bipasha Basu becomes very nervous while performing an item song in 'Omkara'. She says, "On the first day when I went on the set to perform the 'Beedi jalai le' song, the crowd really scared me. I had never seen so many unshaven, unkempt, unbathed and lecherous men in a crowded, sweaty place." Later she gets to know that they all are fine actors. They had been preparing to this 'UP bhaiya' look for weeks. And when she heard the song - 'Namak' it sounded difficult and its choreography is tough too. "That's my favorite. Its great that I actually pulled it off as all the dancing I know is going mad in a disco," she laughs.