The day before her death, she posted a smiling photo with a caption advertising a new underwear range.
A police spokesman said there were no suspicious circumstances surrounding her death.
"At about 8.27pm yesterday (June 20) police attended a property in Medburn, Ponteland, where sadly a 32-year-old woman was found deceased.
"A report will now be prepared for the coroner."
Gradon's boyfriend Aaron Armstrong posted an emotional tribute to the star, saying: "I will never forget that smile."
He added: "I love you so much baby you're my world forever and always."
The tragic star's last social media post has since been revealed - a caring message from Gradon to a pal on Facebook, the Sun reported.
Replying to her ill friend's comment on social media, Gradon wrote: "Hope you're feeling a bit better soon!!!"
Fans and reality TV stars took to Twitter to pay tribute to Gradon and express their devastation.
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