Posing in a fitting black and white dress on Instagram, Tessa said: "Seven months and counting no booze.
And as well as being a healthy lifestyle choice, cutting out alcohol has also allowed the stylish mum of four - founder of the Scottish Fashion Awards - to hunt out some old designer gems from her wardrobe.
Tessa, from Glasgow, is mum to singer Tallia Storm, 26, and Tessie, 27 - who rocked one of her late gran's frocks on a recent night out.
She has also joked she's a "hoarder" and still has designer dresses, including Gucci, which belonged to her late mum.
MULTI-MILLIONAIRE Tessa Hartmann definitely lives the champage lifestyle - but she won't touch a drop of the bubbly.
