Credit: Gregg DeGuire/FilmMagic/Getty Images.

Madonna may be totally in control of her career, but she doesn't have that same control over her teenage daughter.  Last month, a picture of 15-year-old Lourdes smoking a cigarette popped up in the press, and in an interview that aired Wednesday night on NBC's "Rock Center," the superstar mom reveals her less-than-thrilled reaction.

Interviewer Harry Smith said that when he saw the photo, he asked himself, "How did Madonna react to that?"  "She wasn't happy," Madonna replied.  When Smith asked if Madonna is a "tough mom," she admitted, "I think I am but honestly, I don't think I'm as tough as I should be. I think I need to be, maybe, tougher. It's hard, every day is a negotiation. But cigarette smoking, I'm not very fond of.  For anyone."

When Smith pointed out that a recent video of Madonna shows her smoking a cigarette, she acted annoyed and protests, "I don't smoke! That's just an accessory, Harry!  There's a difference!"  Then she laughed and said Lourdes "smoked that cigarette before I did that video!  So she didn't get that from me, ok?"

Madonna also revealed that she was "very elated" when her current album "MDNA" debuted at No. 1, but admits that despite her success, it is sort of hard being Madonna.  "Yeah, I mean I think it's hard, we all have our challenges, to be a single mother of four and work as much as I do and live my life in a kind of metaphorical fishbowl," she told Smith. "It's pretty challenging, yeah. But so far I've survived with sanity and humor intact."

During their conversation, Smith noted that her new album, "MDNA," contains personal lyrics. She replied, "There's a rule of thumb when it comes to writing, and that is write about what you know." When Smith said he sensed anger in her voice, she gave a response in French that she said roughly translates into English as, "I am angry."

Madge later stated, "I certainly have stuff left to say and I think that's really why I'm doing it. I still feel like expressing myself that way and I'll keep doing it as long as I do."

That doesn't mean the Queen of Pop seeks out controversy. Without mentioning anyone by name, she said that some people like to draw attention to themselves by invoking her name. She added, "It works."

Madonna did reveal one of her softer moments of the year: when she performed during halftime of the Super Bowl. She admitted that she nearly cried when she sang "Like a Prayer" amid lit candles inside the Indianapolis stadium.