Pink had a secret romance with N'Sync star Joey Fatone.
The 33-year-old star - who has a 23-month-old daughter, Willow, with her husband of seven years Carey Hart - says she is a ''reformed slut'' and previously dated the 'Bye Bye Bye' singer, 36, in 2000 after she supported the boy band on their North American 'No Strings Attached' tour.
She told the June issue of Glamour magazine: ''Joey Fatone was in love with me. He took me to Friendly's on a date and he bought me an ice cream. Such a sweetheart. He asked my dad's permission!''
But the 'Just Give Me A Reason' singer revealed that she preferred being single than being in a relationship when she was younger and it helped her write her new album, 'The Truth About Love'.
She said: ''I'm a reformed slut,'' explaining that she uses the word to make it less meaningful.
She added: ''It's my very unsophisticated way of taking the power back. I've always had an issue with [the notion that], 'OK, we've both decided to do this. Why am I a slut and you're the player? You didn't get anything from me that I didn't get from you.'''
Pink admitted that her marriage, which went through a rough patch that saw she and her husband split up and reunite in early 2010, still takes work.
She said: ''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.''