Justice has risen up pretty quickly, from being just a sidebar to remixed pop tracks, and into the spotlight. The French duo is about as big as you can get in the dance pop world without spilling over completely into the mainstream. Touring with the MySpace brand, however, is one way to put you over the edge. They’ve amassed a huge following ever since the release of their “Never Be Alone” mash-up in 2003, and have since become more of a household name, with multiple Grammy nominations and media attention for their recent single “D.A.N.C.E.” After a slew of EPs, they’ve finally released their first full length album, Cross, and Gaspard Augé and Xavier de Rosnay are now traveling the country making sure that if you didn’t know them before, you will now. They played a sold out show last night at the 9:30 Club, a night when the venue felt very much like an actual night club, as opposed to your standard rock show.