'It's hard to be motivated to go to the gym': Britney Spears on her struggle to keep in shape

Last updated at 11:49 PM on 23rd November 2011

Britney Spears has admitted that she struggles to motivate herself when it comes to working out.

The mother-of-two and self-confessed chocolate lover, who is currently touring the world with her Femme Fatale show - confessed that it takes a lot of willpower to get to the gym.

'Trying to get up and go work out in the morning [is one of the hardest things]. I haven't worked out in, like, two weeks.

In shape: Britney Spears looked toned and lean while performing in Buenos Aires earlier this week

'Sometimes it's hard to be motivated. But once you get up and do it you feel like you've conquered the world.'

But while Britney might struggle with her shape, her boyfriend of two-years Jason Trawick is said to be on the hunt for the perfect engagement ring for his beloved.

According to Radaronline a source said: 'He has been everywhere from Tiffany to Harry Winston looking for a ring and he is close to making his final decision. Don't expect anything too massive or obnoxious. This ring will be classy and under 4-carats.'

It's a grind: The star leaving the gym with her boyfriend Jason Trawick last year

The star's weight has fluctuated over the years and she began her tour earlier this year looking curvy.

However, as she took to the stage in Buenos Aires earlier this week it was clear she had toned up as a result of her gruelling schedule.

Britney found fame as a Mousketeer on the Mickey Mouse Club alongside ex-boyfriend Justin Timberlake, Christina Aguilera and Ryan Gosling, and said she couldn't be happier about the latter's success.

'Oh, I'm a huge fan; I think he's amazing,' she told Stylist.co.uk. 'I think he's a wonderful little actor. He definitely has that 'something' on film; on camera, which is really cool. So I'm very happy for him.'

She also revealed that artists like Adele and Jessie J inspire her to do better.

The 29-year-old said that new talent keeps her on her toes.

'I think it's great to have a little competition because I feel it inspires us [Team Britney] and makes us want to do better.

'There are so many soulful singers, even the ones coming from London, like Adele and Jessie J, who are just amazing. It feels like a really cool time to be making music now.'

She continued: 'In the beginning obviously I was very young and I didn't know the ins and outs of things; I was very instinctive in what I wanted to do, and I was very vocal with my input on things.

'I think as the years have gone by, and as I've evolved as an artist, I've put even more into my career, and after that amount of time you start to know exactly what you want.'

Battle of the bulge: The star was certainly curvier when she began her tour in June