GaGa 'wrote number one in ten minutes'

Lady GaGa has revealed that it took her just ten minutes to write her worldwide number one 'Just Dance'.

The 23-year-old admitted that she had been surprised by the success of the song considering how easily she had come up with it.

"It's been unbelievable the way the song has crossed over into the mainstream. It took ten minutes to write!" she told Heat.

"I think it's [popular] because it's a happy record. Maybe the record will be appreciated more now there are lots of people who are going through rough times, losing jobs and homes."

The star, whose album The Fame and second single 'Poker Face' both reached number one, claimed that her success was helping making pop music credible again.

"Pop is seen as manufactured and plastic, but it's not - it's fun and it's great," she added.

"Truthfully, I don't think there's one person on the planet who does what I do."

> Click here to read our interview with Lady GaGa