Pink admits marriage is hard.

The 'Stupid Girls' hitmaker tied the knot with motocross star Carey Hart in 2006 - splitting two years later but reuniting in February 2010 - and she credits communication with making heir union work, though she says their relationship isn't always harmonious.

Pink - who has two-year-old daughter Willow Sage with Carey - said: ''Are things ever good? I don't believe that exists. Long-term relationships are an everyday choice. It's harder to be in a marriage than it is to bounce from one relationship to the next. We're good because we communicate and we've grown up together, not because we don't fight.''

While Pink loves being a mother, she can't help but worry about her active little girl following a terrifying accident which the singer describes as the ''worst day'' of her life.

She recalled to the new issue of America's Glamour magazine: ''Willow and I were at the pool, and I was taking her to nap time. She was walking just a foot in front of me. And she trips and falls and gets a concussion. She passed out. Cut to an ambulance and fire truck. And a CAT scan. She was about a year old.

''That was the worst day of my life. And what do they say? 'Kids fall.' Welcome to parenthood, I thought. I can't handle this. I'm fitting her for a bubble.''

''Every time she bounced on the bed, I see stitches. Being a parent is a Jedi mind f**k. It's also the raddest thing ever.''