Before she was famous: Outrageous pop star Ke$ha when she was just a nervous teen on a talent show



It's what every celebrity dreads when they hit the big time - old pictures and video footage of before they were famous.

The latest star to face this embarrassment is singer Ke$ha after a tape of her performing when she was 13 years old surfaced on the internet this week.

And her blushes will come as no surprise because the teenage Kesha Rose Sebert couldn't look more different to the sassy 22-year-old star she is today.

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Karma Police: A teenage Ke$ha singers a cover of the Radiohead song at a school show



All grown up: Ke$ha attends the NME Awards on Wednesday night



Looking fresh-faced and very natural with her wavy dark hair, Ke$ha sings a cover of Radiohead's Karma Police, which some may consider a strange choice for a teenage girl.

And unfortunately for her, she clearly had a long way to go before fine-tuning her vocals into the pop star voice she has today.

The singer, who grew up in Nashville, Tennessee, was in the seventh grade when she performed at what appears to be her middle school's talent show.

And that school's stage is a far cry from some of the venues she has graced since her pop career took off early last year - and an even further cry from the rock chick look she sports now.

Ke$ha has described her dress sense as 'garbage-chic' naming Keith Richards as her fashion inspiration.

She has also been noted for her party girl image and once said: 'Whether people like me or not I just don't care.'

Ke$ha got her breakthrough after singing backing vocals on Flo Rida's number one hit Right Round.

But it was her debut single Tik Tok which went to number one in nine countries after its release in August 2009, that shot her to fame.

Her debut album Animal, which was released last month, also went to number one in the US album charts.



And despite her croaky start in front of the microphone at the age of 13, music is in her blood after being raised by her singer and songwriter mother Pebe Sebert.