Watch the former Home and Away starlet breaking down in tears in the video above then dancing the rumba to 'Tale As Old As Time'.
The 22-year-old dedicated the song to her dad, who would dance with her to the Beauty and the Beast classic when she was a little girl. But sadly had to move away for work when she was young.
"He would pick me up," she said. "[He would] dance me around the living room and make me feel like a princess."
With her dad supporting her in tears from the front row, Rhiannon rushed to hug him after the performance.
Reece Mastin wasn't watching the performance from the crowd last night, but he did express how proud he is of his 22-year-old girlfriend.
"Rhiannon is one of those people where, when she sets out to do something, she is going to do it full pelt or she's not going to do it at all," he told Access All Areas.
"She is working her ass off and it's showing."
It sure is! Rhiannon was awarded a perfect score for her and partner Aric Yegudkin's rumba last night.
She also stunned the audience on last week's show by donning a racy catsuit for a cat-burgular jazz routine. Re-live this sexually charged performance below.