The now 24-year-old headed to London with her sister Charlie Ann Lott and, rocking a chic coat and shades, looked very cool as she marked turning a year older.
Updating fans on her birthday fun, Pixie couldn't resist uploading a few snaps to Instagram throughout her day.
The 'Lay Me Down' singer kicked off her celebrations with a winning combination of champagne and chocolate at Fortnum & Masons department store.
In her photo, Pixie looks every inch the fashionista in her black, white and pink printed Mac. Sweeping her blonde locks up into a messy updo, Pixie finished her look with plum-coloured lipstick and her retro cat eye shades sitting pretty on her head.
Treated to a chocolate cake bearing a candle and 'Happy Birthday' written around the plate, the starlet was all smiles as she made her birthday wish.
Pixie then later shared another picture of herself and her sister indulging in cocktails. Alongside her photo she wrote: "BDAY dwinkz with my fave gyal @lottcharlieann missing our 360 @stephengeorgelott."
Looks like she had a fun-filled day.
Meanwhile, the Strictly star is enjoying being back in the studio after her recent stint on BBC's dancing contest.
Last month, Pixie narrowly missed out on a place in the Strictly Come Dancing semi-finals after Len Goodman opted to save Blue singer Simon Webbe instead.
Now, she has turned her attention back to her music and has been teasing fans with plans for new material. Sharing a photo of herself hard at work in the studio, Pixie said: "[Loved] writing with @cassellthebeatmaker + Eric today #FEELGOOD who's ready for new music?."
Pixie's latest release, her greatest hits album Platinum Pixie, came in November last year.
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Watch Pixie's video for 'Caravan Of Love' here: