The 31-year-old Brit singer and actress was spotted out wining and dining at London's Groucho Club with her husband Laurence Fox on Thursday night sporting a pair of white buckle strap Birkenstocks.
The mid-length down do is classic "I woke up like this" bedhead - but that's her thing and it works. As do the Birkenstocks - so get involved if you're partial to a classic, mega comfortable sole.
As for husband Laurence Fox? He also kept his look casual in a grey button-down coat, black jeans and military style high tops.
STYLE STEAL: Love Billie's look? Take a click through this style file to see more awesome outfits from the lady and be prepared to love them all.
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