The American superstar has become the first artist in 19 years to achieve five US No. 1 Pop Chart entries from just one album.

'California Gurls', Teenage Dream', 'Firework', 'E.T.' and 'Last Friday Night' are the singles that bagged Katy her spot in chart history.

And Katy looks set to get five No. 1s on the US Hot 100 chart too if 'Last Friday Night' makes the top, which will match Michael Jackson's record of five No. 1 singles from his 'Bad' album in 1988.

Katy's ‘Last Friday Night’ has become the most played single on US pop radio this week with 12,468 plays.

Not bad for an artist who only released her debut single 3 years ago.

Have Ты ever been casually trying on a new dress when a huge group of people mistake Ты for Lady Gaga?


No? Well that's what happened to Kelly Osbourne yesterday.

The TV звезда had to leave the Dolce & Gabbana store in Лондон after being swamped by little monsters during a dress fitting.

She later took to Twitter to correct their mistake.

"I had to leave this place everyone thought I was @ladygaga and accosted me. I truly mean no disrespect I Любовь @ladygaga but it's to much for me to handle I have a hole new respect!!!!! (sic)"

Lady Gaga is currently touring in Australia.