The X Factor judge tweeted that several fans had asked why she had not spoken about her ex-boyfriend and former N-Dubz bandmate's new single 'Killer'.
She stated that she has her "reasons" for not openly talking about her former group, and that fans sometimes make it difficult for any possible comeback.
"Guna block any1 that has a go at me 4 not tweetin fazers single," she tweeted. "U dont know the insnouts n its no1s business.I have the right & my reasons (sic).
"A real ndublett wudnt judge n let us deal with what ever issues there r in our own time.All this siding will just make it harder 2 reunite."
She later reassured fans that a future N-Dubz reunion may still be on the cards.
"Thanks 4 understanding,its not like the 3 of us never argued when we was 2gether. Nothins changed n it don't mean we wont get back 2gether x".
Fazer recently vowed never to date anyone famous again due to the attention of the press.
Watch the video for Fazer's 'Killer' below: