We already know that Charice and Chord Overstreet will both play key roles on season two of Glee.

But at the premiere party this week, cast and crew members revealed multiple second season tidbits, including just how and when Charice's Sunshine Corazon and Overstreet's Sam will be introduced. Read on for a few significant spoilers...

• Charice's Sunshine will waste little time squaring off against Rachel. She'll sing "Listen" from Dreamgirls on the September 21 premiere.
• Overstreet's Sam, meanwhile, will join the boys of New Directions on Travie McCoy's "Billionaire."
• A Cheerio gets a boob job.
• No Terri or Emma in the first episode back, but Jessalyn Gilsig teases: "I'm going to start a relationship with somebody, and it's going to, by its nature, put me around Will."
• The third episode of the season will focus on religion, with Finn singing the R.E.M. classic "Losing My Religion."

Get a look at all the songs that will be covered on the season premiere and get psyched, fans. Less than two weeks to go!

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.