I don't understand - which of her albums flopped in the US? Try This, perhaps, but that flopped everywhere. I get that she's more popular in the UK and Oz than the US but she's always still been a major star. She's the female with the 3rd most top ten hits since 2000 , behind only Rihanna and Beyonce. So she's had more top ten hits since she launched than Britney, Christina, Mariah, Madonna, Kelly Clarkson, Avril, Shakira and J Lo. That doesn't sound like a flop to me.