Mel B reacted angrily during an interview with her America's Got Talent colleague Howie Mandel on US radio.

The X Factor judge was interviewed by Howie and DJ Howard Stern - and lost her rag when asked about tabloid sex rumours and a Spice Girls reunion.

Asked about her reported sexytime with a Playboy model, Mel told the pair to "shut up".

The Sun reports that Mandel then broached the subject of a Spice Girls reunion, asking: "Isn't it always Victoria that says no? Didn't Posh swear off of it?"

To which Mel replied: "Stop being a b*tch. Don't believe everything you read — b*tch. You are a big b*tch."

Mandel apparently told her: "Stop calling me a bitch."

And as the row escalated listeners reportedly heard him aim the C-word at her.

Mel then got even more angry and was heard yelling: "B*tch, b*tch, b*tch."