Harman Baweja and Bipasha Basu confessed about their relationship last year but Bipasha confirmed their break up in December 2014.
Talking about the party, a source told Mid Day, "Madhavan called his co-stars and friends from the industry to celebrate his birthday as well as the success of his latest release, Tanu Weds Manu Returns."
"Bipasha who has worked with Madhavan in the past arrived with Rocky S and Dino Morea while some time later, Harman too arrived with Raj Kundra and Shamita Shetty in tow," the source added.
Pics: Kangana, Bipasha & Celebs At Madhavan's Birthday Bash
"Bipasha was seen interacting with most of the guests at the party, but chose to stay clear of Harman," the source told.
According to rumours, Harman Baweja's closeness to a foreign model named Olega was the reason behind their break up. In the past also Bipasha went through the same thing, when John cheated on her.
It is said that Bipasha is now dating her Alone co-star Karan Singh Grover, who got married and divorced twice. And both the times, he was accused of cheating, by his ex-wives.
Well, some people never learn from their past mistakes!