Alexandra Burke said that Tulisa Contostavlos of N-Dubz fame will be a huge success on this year's X Factor judges panel. 

Tulisa will join fellow judges veteran Louis Walsh, and newcomers Gary Barlow and Kelly Roland when X Factor returns to UK screens on August 20.

In an interview with Metro, Alexandra said: "Tulisa will give it that swagger and edge no other judge has ever been able to give. She knows what the kids want and what's cool and she's going to give the show a whole new edge. She'll produce some great acts."

She also praised fellow judge, Take That's Gary Barlow, saying: "When I found out Gary Barlow was going to be a judge I was like, 'Gary Barlow all the way.' I think the new line-up will be fantastic for the show, it's fresh."

Watch Alexandra Burke's video for 'The Silence' here: