Judges Len Goodman, Bruno Tonioli, Darcey Bussell and Craig Revel Horwood were shocked to find Rachel in the dance-off.
Len called her American Smooth her "best dance yet" and she bagged an impressive score of 30 following her performance with dance pro Pasha Kovalev on Saturday night's Halloween-themed show.
But despite her score, Rachel, 27, faced a battle in the dance-off with model Abbey Clancy, who some think could win the competition. Rachel said: "I'm going to go out there and enjoy it and give it my all."
Sadly it wasn't enough, as the judges unanimously voted her off.
Poor Abbey, 27, was gutted to find herself competing with Rachel, who she's grown close to since the stars first donned their dancing shoes.
The tearful mum-of-one said: "'It's just made me realise how much I don't want to leave. I don't want to be in it with Rachel as she is my best friend."
Blub! That wasn't the end to the waterworks, as Rachel was also feeling emotional once she'd learned her fate.
She said: "I haven't cried until now, I have made some amazing friends. I really enjoyed tonight, I really enjoyed yesterday's dance so I'm really pleased to go out on a high.
"Abbey is just gorgeous, a gorgeous dancer, a gorgeous girl and I have no shame in getting knocked out to her."
And as Rachel left the Strictly Come Dancing studio for one final time, she took to Twitter to thank her fans for their support.
She tweeted: "Trying to catch up with all the tweets but so many! You've stopped me crying…for now! Best experience ever can't thank @PashaKovalev enough."