It's almost time for your favorite shows to return with all-new episodes, but why wait until September to see new footage?

Below you'll find the new promos for NBC's 'The Sing-Off,' Fox's 'Fringe' and CBS's 'Hawaii Five-0.'

'The Sing-Off' video from E! Online features new judge Sara Bareilles in action and tons of talent.

The 'Fringe' promo -- thanks to Give Me My Remote for pointing it out to us -- has Walter sitting in front of a bunch of speakers, listening to music when suddenly -- well, just watch.

And last but not least, 'Hawaii Five-0' features new footage of the team and McGarrett's mentor John Locke 'Lost' star Terry O'Quinn.

Having climbed aboard the 'Sing Off' bandwagon one year and one episode late -- I only hopped on after watching the first episode of this season via Hulu on a sleepless Tuesday night -- I can confidently say that I never thought I'd so eagerly anticipate the final episode of a reality series featuring a cappella groups competing for a largely irrelevant record deal. (Because, um, why would that ever be a thing? But oh, is it a thing.)

Then again, I was a choir kid in high school. I was in an a cappella group, a girls' choir, a girls' ensemble, a madrigals group, a regional choir, a concert choir and a chamber choir all during my senior year. So, uh, if there was ever a built-in audience for a show, I'm it. But I haven't watched any other talent show for pleasure -- not even 'American Idol,' except that one year I had to report on the results for work. So what is it about 'The Sing Off' that got me to tune in?

When 'The Sing-Off' debuted on NBC last year, it didn't make a big splash. It wasn't record-breaking television, just a fun little talent show that a fair amount of people enjoyed. It filled the dreaded pre-holidays programming lull. It gave Nick Lachey a job.

But things were different when the a cappella singing competition returned for round two. The show got nearly 2 million more viewers during last Monday's premiere than season 1's debut episode, and last night gained an impressive 18 percent from that number for an all-time ratings high (3.3 in the 18-49 demo, 9.4 million viewers).

So, what's different this year?

The combination of amateur singers, famous songs and national TV could be a great concept. Or, it could be a terrible one. The premiere of 'The Sing-Off' (Mon., 8PM ET on NBC) left it up to the viewers to decide.

The reality show features ten amateur singing groups -- all competing for a recording contract and a $100,000 prize. Season Two started with a bang, of sorts. Viral video sensation 'On the Rocks' performed their rendition of Lady Gaga's 'Bad Romance.' If you're not familiar with this song, here are some of the lyrics:

Rah-rah-ah-ah-ah-ah! Roma-roma-mamaa!
Ga-ga-ooh-la-la! Want your bad romance.

Now, imagine those words filtered through the vocal stylings of a bunch of guys from the University of Oregon, and you should have a good idea of what 'The Sing-Off' is all about.

Could a cappella music be going mainstream?

NBC's probably hoping so -- the second season of its surprise reality hit 'The Sing Off' premieres tonight, featuring ten a cappella groups from across the country vying for a $100,000 prize and a recording contract.

Puerto Rican group Nota walked away with the title last year, but second-place finishers the Tufts Beelzebubs are the ones still making headlines: the group arranged and recorded the 'Glee' hits 'Teenage Dream' and 'Hey Soul Sister.'

A cappella + rap = a match made in heaven? On last night's 'Sing Off' episode 2, the seven remaining a cappella groups tackled big hits and guilty pleasure songs, like Flo Rida's 'Right Round' and 'Stayin' Alive' by the Bee Gees.

But the judges gushed most over group Nota's take on 'Down' by Jay Sean. What did you think of last night's performances? Which group came out on top? Watch the full episode now!

Remember the short-lived series 'Don't Forget the Lyrics'? How about 'The Singing Bee,' hosted by 'N Sync alum Joey Fatone?

Well, here comes one even shorter: According to PEOPLE, Nick Lachey will host the NBC series 'The Sing Off,' a four-night event in which eight groups of people will compete using only their voices.

"It's just them naked on stage," Nick Lachey said of his new gig.

NBC is getting into the holiday spirit the old fashioned way: with a week of caroling.

Yes, Variety reports that NBC has announced their schedule for December and it includes four days of their new a capella competition 'The Sing-Off'. The show, which borrows liberally from Fox's surprise smash hit 'Glee' by featuring a capella performances of popular pop tunes, will roll out with a series of two-hour specials beginning Mon., Dec. 14 and culminating in a grand finale a week later on Dec. 21.