Britney Spears Launches In London

Britney Spears kicks-off the first European stop of her 'Circus' tour at the O2 Arena in London, England on Wednesday (June 3).

The 27-year-old singer's former assistant, Alli Sims has just shared about her experience working for Britney. I just feel like, you know, she had kids fast,' Alli said. There was a divorce going on and that's a lot for a young person to handle.'

'She was just like, 'I wasn't ready for them... you know, to go home',' Alli recounted to Access Hollywood. It was a mom just being protective and a mom that didn't want her kids to leave... I mean, it's weird when you have kids three days a week and you're used to having them all day everyday.'

10+ pictures inside of Britney Spears launching in London…