The Waterloo Road star was joined by best pal Tulisa as she celebrated her birthday on Tuesday (6 August), sporting a dazzling minidress.
But the next day was a more casual affair for Chelsee, who opted for an oversized varsity T-shirt whilst out in London.
And after partying all night in towering platform heels, we're not surprised she chose a comfy pair of trainers to run her errands in.
She gave her skin a rest by going make-up free, shielding her peepers with giant sunnies and scraping her locks into a low ponytail.
Chelsee isn't the only celeb loving varsity tops right now - we've also spotted Little Mix's Jesy Nelson recently rocking an Adidas tank dress.
While we prefer Jesy's glamorous take on the look, we don't blame Chelsee for keeping things low-key the day after her big night.
We bet she had a sore head to boot - ouch!
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