Former N-Dubz frontman Dappy has pissed off a lot of people by publicly insulting Tulisa’s boss, Simon Cowell in a concert.

The controversial rapper shouted ‘F*** Cowell’ at his solo gig on Sunday night  in Manchester, also taking a dig at X Factor hopefuls

This is what fame is, not standing for hours outside to audition for X Factor

The 24-year-old is clearly still annoyed that he was banned from appearing on the show because he ‘wasn’t right’. Dappy even made a threat to Cowell at the concert attended by his many fans

We wanted to go on the X Factor to be with Tulisa on judges’ houses but the people who own it thought that we wasn’t right.  Simon, I’m coming for you, bro. I don’t care, I don’t give two s**** – you’ve made a big mistake, man. Watch your back, Simon! I’m gonna get hits and No.1 singles and show you!

Tulisa, no doubt must be feeling very embarrassed. Let’s hope Dappy’s thoughtless words don’t ruin her chances of being an X Factor judge next year!