"I wasn't very happy. I am a tough mother but I don't think I'm as tough as I should be. I think I need to be tougher. It's hard -- every day is a negotiation. But cigarette smoking I'm not very fond of -- for anyone," she said.

Madonna. Pic/Santa Banta

The 53-year-old, whose new album MDNA bombed after one week, is seen smoking in one of her recent videos, but she defended her own actions against her daughter's, reported Radar Online. "I don't smoke.

That's just an accessory. There's a difference. Lourdes smoked that cigarette before I did that video!," she added. The Queen of Pop said it is difficult raising her children alone.

"To be a single mother of four, work as hard as I do, live my life in a metaphorical fishbowl, it's pretty challenging. But so far I've survived with sanity and humor intact," she said.