Welcome once again to our monthly catch-up session, in which we get you up to speed on all things shiny and new in pop! This month's Top 10 is dominated by both big names you know -- JLo! Flo Rida! Maroon 5! -- and up-and-coming names you're going to want to get to know fast ( Marina & the Diamonds! Frank Ocean! Missy Higgins!). Oh, and one very sparkly soundtrack featuring Jordin Sparks in her first starring role and the dearly departed Whitney Houston in her last (hearing her voice again -- sounding pretty robust -- is a moving reminder of just how much she's still missed). Listen up!