Nicole Scherzinger's Lady Gaga-style shoes fail to distract from her post-split weight loss

She's had a difficult few weeks following her split from Lewis Hamilton.

And it seems the stress has taken its toll on Nicole Scherzinger, who displayed her tiny waist and skinny legs as she arrived at London's BBC studios today.

The 33-year-old singer donned a wild patterned dress as she paid a visit to Radio 1, coupled with a pair of Lady Gaga-style heel-less shoes.

Well heeled: Nicole Scherzinger is pictured outside the BBC Radio studios in central London

Footloose and fancy free: The singer wore a pair of shoes likely to have been the handiwork of Lady Gaga's shoe designer, Noritaka Tatehana

While Nicole has never been on the larger side, the former Pussycat Dolls star was noticeably slimmer as she smiled and waved to photographers, signing autographs as she made her way into the BBC building.

Nicole's garish dress comprised various materials, including netting around her collarbone area and bits of string keeping the sides together.

Meanwhile on her feet she wore a pair of beige shoes, most likely the work of Lady Gaga's shoe designer, Noritaka Tatehana, with a black angular pattern on them.

Getting on with it: Nicole appeared chirpier while posing with fans and signing autographs

Nicole has been touted as Kelly Rowland's replacement this weekend, after it was announced that the Destiny's Child star will be staying in Los Angeles where she is laid up with a throat infection.

The singer has been scheduled to perform on the show, but observers believe she may also use her experience as a judge on the U.S. X Factor to stand in for Kelly this weekend.

She also appeared on This Morning, arriving at ITV's studios appearing to be in much better spirits than she had yesterday, when she appeared upset and subdued as she walked through Heathrow airport.

Weight loss: A source says Nicole is going through a tough time, clearly evident in her skinny frame

Again her skinny frame was clearly visible, accentuated by her figure-hugging green and black leopard-print minidress.

A source told The Sun yesterday: 'Nicole has been going through a tough time.

'She's juggling work and trying to get over the split with the man she thought she would end up with.'

Been on the heartbreak diet? Nicole Scherzinger displayed her tiny waist in a skintight dress as she arrived at the ITV studios today

Slender: Nicole's form-fitting dress highlighted her slimmed-down figure

Transformation: Nicole looked significantly slimmer than she did this time last year

Shady lady: Nicole teamed her dress with sky-high heels and huge sunglasses

Nicole and Lewis broke up earlier this month, and it was claimed today that the pair split because of the 26-year-old F1 driver's reluctance to settle down and have children, according to the Daily Mirror.

Sombre: Nicole yesterday looked subdued as she arrived in London

'I'm not ready for a family,' Hamilton reportedly told friends.

A source told the paper: 'Lewis decided they had to part. She wanted more than he could offer at this stage in his life.'

X Factor USA judge Nicole allegedly wanted to take things to the 'next level' with her boyfriend of four years.

Back in 2009 she told the Mirror: 'I am the happiest I have ever been. Lewis is such an amazing, humble and chivalrous guy. We would love to have beautiful angel babies together one day.'

Lewis spoke to the paper about the split but confirmed the pair are still friends.

He said: 'Yeah, we're friends at least and we can move forward. It's never easy going through tough times.

'It's these kind of times that are sent to try you, and it's about how you pull through them.

'I've my family who are helping, so I feel pretty good. And I've many more days coming up with my family over Christmas and all that, so I'm really looking forward to it.'

Happier times: Nicole split from racing driver Lewis Hamilton earlier this month