But the former Spice Girl has been pictured grinning away after she completed an arduous hike.
Best friend and hairdresser Ken Paves posted a snap of Posh with a big beam on her face after the pair walked up to the famous Hollywood sign on Wednesday.
"So glad to have you back! So much fun hiking and laughing in the LA sunshine with @VictoriaBeckham," he tweeted.
The fashion designer responded with her own Twitter picture, and amazingly she was smiling again.
"So good to be back in LA, and hiking,who knew? X vb," she captioned the image.
It seems Victoria is much happier in her own skin these days – or at least more willing to be photographed showing her pearly whites – as husband David Beckham uploaded a picture of her laughing on his Facebook page back in June.
"See I told you she smiles," he posted on the social networking site.
While Victoria appears to be having the time of her life in the States, she hasn't ruled out plans to expand her clothing empire back in the UK.
According to reports, she's considering a property in London's upmarket Mayfair in which to open her first fashion boutique.
"[London] is where I want to have my first store. I'd like to do something that is really new, really fresh. Something a little bit conceptual but not too much," she recently told interviewers.
It could be the right time for the Beckham family to move, as David retired from the football pitch earlier this summer following a glittering 20-year career.