The search for the Hottest Male and Female Star of 2013 continues -- and the intensity is off the charts! We've got four males and four females left, competing for the sizzling titles. So who should be crowned PopCrush’s Hottest Male and Female Star?

So, we started with 16, and now we have eight remaining -- two sets of hot studs and two sets of lovely babes -- fighting for the winning titles. For the male semifinals, we have Justin Bieber up against another fellow youngster, up-and-comer Austin Mahone. James Maslow of Big Time Rush will got head-to-head with dancer and R&B crooner Chris Brown.

Then there's the gals, who know how to show off their killer curves. For the female semifinals, we have former Disney stars and BFFs Selena Gomez and Demi Lovato battling it out. Then there's Rihanna, who will duke it out with 'Applause' songstress Lady Gaga.

Whoever wins the semifinals will go onto the championship round and battle it out for the Hottest Male Star and Hottest Female Star of 2013. It’s important to know that YOU decide who is deserving of these titles, PopCrushers.

So, who will come out on top in the Hottest Star of 2013? Voting for the Semifinals will run until Sept. 13 at 2PM ET — and the winners will go on to compete in the Championship round. Good luck!