Pop babe leaves little to the imagination as she takes to the stage at Access All Eirias concert

Diana Vickers in her knickers! Pop babe leaves little to the imagination as she takes to the stage at Access All Eirias concert

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UPDATED:

22:44 GMT, 29 July 2012

She turns 21 on Monday and Diana Vickers was eager to prove she’s all grown up as she flashed her underwear on stage in Wales yesterday.

The former X Factor contestant performed among a line-up which included Olly Murs, Pixie Lott and Cover Drive at the Access All Eirias concert in Colwyn Bay but she made sure all eyes were on her in a daring outfit.

The blonde singer wore a purple T-shirt embellished with silver tassels for her turn on the main stage but appeared to have forgotten the rest of her outfit as she paired it with just a pair of printed underwear and matching heels.

Diana Vickers ensured all eyes were on her at the Access All Eirias concert in Wales yesterday as she took to the stage in just a T-shirt and her knickers

Diana Vickers ensured all eyes were on her at the Access All Eirias concert in Wales yesterday as she took to the stage in just a T-shirt and her knickers

Diana Vickers ensured all eyes were on her at the Access All Eirias concert in Wales yesterday as she took to the stage in just a T-shirt and her knickers

Diana's underwear matched her high heels as she performed ahead of her 21st birthday on Monday

Diana's underwear matched her high heels as she performed ahead of her 21st birthday on Monday

Diana gave an energetic performance, jumping around the stage unconcerned about showing off her knickers and also made a variety of strange facial expressions.

While her birthday isn’t until July 30, Diana celebrated a week early when she threw a bash with some of her closest friends earlier this week.

Diana threw herself into her performance at the Access All Eirias concert in Wales and pulled a number of strange facial expressions in the process

Diana threw herself into her performance at the Access All Eirias concert in Wales and pulled a number of strange facial expressions in the process

Diana threw herself into her performance at the Access All Eirias concert in Wales and pulled a number of strange facial expressions in the process

Wearing a floor length black dress complete with sheer panels, the popstar showed off her slim frame as she held hands with her beau as they left the club.

Diana wasn’t the only performer to give a glimpse of her underwear at the event.

All grown up Perhaps Diana was eager to prove how mature she is ahead of her 21st birthday on Monday

All grown up Perhaps Diana was eager to prove how mature she is ahead of her 21st birthday on Monday

Pixie Lott took to the stage in a demure green and yellow dress with a white collar and sleeves but a guest of wind lifted its hem, showing her own knickers to the crowd.

The pop babe appeared to be enjoying herself however and at one stage could be seen smiling as she held up a purple teddy bear given to her by a fan.

Pixie sported dark eye-make up and had her blonde hair pulled back into a messy braid.

Demure! Pixie Lott took to the stage in a sweet printed dress and was delighted to receive a teddy bear from a fan

Demure! Pixie Lott took to the stage in a sweet printed dress and was delighted to receive a teddy bear from a fan

Demure! Pixie Lott took to the stage in a sweet printed dress and was delighted to receive a teddy bear from a fan

Meanwhile, Olly Murs appeared to be having a blast as he headlined the outdoor event at Eirias Stadium.

Wearing his number one wardrobe accessory, Murs donned a brown trilby hat with a pair of black jeans and a white printed T-shirt.

A blue shirt and a pair of black brogues completed the Essex lad's look.

Tired from his busy weekend but excited
to get the crowd moving, yesterday he tweeted: 'I've just woken on the
bus to find out… I've arrived in COLWYN BAY, NORTH WALES!! #happydays
Weather is lush aswell.. big show tonight..'

Pixie also flashed her underwear although it appeared to be accidental unlike Diana's

Pixie also flashed her underwear although it appeared to be accidental unlike Diana's

The 28-year-old certainly impressed fans at the concert, as many of them took to Twitter to write about how amazing Olly's showing was last night.

One fan wrote: 'Well @ollyofficial you killed it tonight #accessalleirias'.

While another tweeted: 'Tonight was amazing!! Was squished all the way thru but hey it was worth it :D!olly was amazing šŸ™‚ #AccessAllEirias'.

Entertainer: Olly Murs was in high spirits as he headlined the day, even though he had partied at Marvin Humes and Rochelle Wiseman's wedding just the night before

Entertainer: Olly Murs was in high spirits as he headlined the day, even though he had partied at Marvin Humes and Rochelle Wiseman's wedding just the night before