Sarah-Jane is currently living in Los Angeles, where she hosted the E! Golden Globes watch-along party earlier this year.
And since moving to the states, the DJ and TV presenter has been totally rocking her tousled, choppy bob after going for the chop in October 2015.
But it was all change for SJ on Wednesday (6 July), as she took to Instagram to show off her super-glam new look.
"A little blonde action for summer," Sarah-Jane posted along with the sexy selfie, above.
Sarah-Jane became brand ambassador for Sleek Hair Extensions in May so it was only a matter of time before she had a whole new hair makeover.
And we're loving this longer, sleek look which has been left dark at the roots, going blonde towards the ends.
In the words of TV presenter Katie Piper, who is a good friend of Sarah-Jane and who commented on her gorgeous new look:
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