The Hunger Games - Suzanne Collins www.suzannecollinsbooks.com/
This book deserves all the hype it got - it is a refreshing concept, a twist in reality which could easily happen. I am not someone who enjoys fly on the wall shows like Big Brother, and yet in a strange way I like this - real people forced to fight in a gladiator-like scenario, to kill all their opposing competitors, to keep themselves alive, to keep their families fed & out of prison, purely for the entertainment of the vapid people of the Capitol and to prove to the population that the government is in control at all times. 
Friends & Rivals : Tilly Bagshawe
www.tillybagshawe.com

It is written with authority, it is very current and there are plenty of characters in it who are thinly veiled versions of real music industry celebrities. If "bonkbuster" is still a genre, this book fits it - the characters are not very likable but if you love to read about rivalry & squabbling, you will enjoy this!
I have previously read another of Tilly's books "Fame" which is equally escapist, racy & fun but which revolves round the film industry - I can recommend that too!