Britney Spears had an awkward moment with Victoria Beckham when they met at a Hollywood hotel last week.

The troubled singer bumped into Victoria and her husband David at the Chateau Marmont last Tuesday, but, despite their highly-publicised move to LA, she seemed not to recognise the couple.

"Victoria said: 'Hi Britney. I'm Victoria from the Spice Girls'. But Britney had no idea who she was," an onlooker told The Sun. "She just looked at her with a vacant and bemused expression and turned and walked away."

Spears's recent behaviour has sparked fears about her mental state. She has made headlines for a meltdown during a photoshoot for OK! magazine, storming out of filming for her own music video, and allegedly threatening a paparazzi photographer.