She unveiled the new bob in an Instagram shot this week with pal Ellie Goulding as she wrapped up her world tour in London.
Her supermodel pal Cara posted a snap of her getting the dramatic change backstage in a room full of people, as her long hair fell to the floor.
‘‘London, I could never thank you enough. See you next time! PS: short hair, don't care,’’ she tweeted.
The starlet embraced British singer Ellie Goulding, with whom she sang in her final show, wearing a black-and-grey plaid shirt and coral lips in the picture.
Model Delevingne also posted a picture of the trio messing around and posing for the camera backstage.
The singer decided to opt for the dramatic transformation of short wavy tresses with a side-swept fringe as she came to the end of a tour that spanned the globe.
Taylor posted the new look as she geared up to jet out of the UK after one final show at London’s O2 Arena.
Stepping off her transatlantic flight from London, the singer rocked her new blonde bob as she strolled through Los Angeles International Airport.
The country singer made her way through the LA airport with a chic black handbag and guitar in hand.
The music icon played it low-key in a black floaty skirt and top with burgundy boots.
She injected a bolt of colour with her pillar-box red lips, accompanied by a flick of black eyeliner on her piercing blue eyes.
It’s unclear whether this single lady will be spending time with a special someone this Valentine’s Day.
She has previously been linked to singer Joe Jonas, Twilight's Taylor Lautner, Glee's Cory Monteith, musician John Mayer, actor Jake Gyllenhaal and most famously One Direction’s Harry Styles.