Tamera, 16, and 20-year-old Joshante are said to have called time on their relationship due to the pressure of the hopeful's newfound fame.
According to the Mirror, Joshante has changed his relationship status on Facebook to 'single'.
A source added: "For Tamera her priority is The X Factor and that has been tough for Joshante to cope with.
"She is getting lots of attention from other admirers, including some guys within X Factor who fancy her."
Tamera has only been dating Joshante a short while and was previously accused of pinching him off another girl.
The pair were said to have fallen out with each other following a big row last week, however they were thought to have briefly made up before finally splitting.
Prior to dating Joshante, Tamera was in a five-year relationship with childhood love Duwaine Sarumi, now 17.
The pair met at school and, in a recent interview, Duwaine said: "It was a long time into the relationship when she finally plucked up the courage to sing in front of me. I was blown away and I told her so."
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