Katy Perry says she "owes" fans after equaling a US chart record.

The 26-year-old singer thanks fans after her latest song "Last Friday Night (T.G.I.F.)" topped the Billboard Hot 100, making it the fifth track from her Teenage Dream one album to top the charts - a record initially set by Michael Jackson with the singles from his 1987 album Bad.

Upon hearing the news, Katy Tweeted, "What a way to wake up! SO proud to announce that the little-engine-that-could of a song 'LAST FRIDAY NIGHT' is officially #1 & made HISTORY! & u know, I couldn't have done it with out ya, really I owe u guys BIG... so take this moment to give yourself a high FIVE!!! #allbecauseofu (sic)"

The other chart-topping singles from Katy's third album, Teenage Dream, were "California Girls," "Firework," "E.T.," and the record's title track.

Although Katy has taken a longer time to reach the record than Michael did, the tracks have spent longer at the top of the chart, with a total of 18 weeks so far. She has also broken a record for the most weeks in the Billboard chart's top 10, with 66 weeks. The record was previously held by Swedish act Ace of Base, who clocked up 48 weeks.

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