Los Angeles -- R&B; star Beyonce Knowles has dismissed rumours that she had her first child with husband Jay Z with the help of a surrogate mother. The 30-year-old singer, who gave birth to a daughter on January 7, says she found the rumours crazy, reported Aceshowbiz. "It wasn't hurtful, it was just crazy. I thought 'Where did they come up with this?'" Beyonce said. Beyonces mother Tina has also expressed her anger over the speculation. "I thought it was very unfair and very cruel that someone would think that someone would be that diabolical to keep up a charade like that for nine months. As a mother it was painful for me to hear the crazy rumours. And I even had people ask me, which was so ridiculous," she said.