SNC, which was originally formed by a group of friends at Indiana University more than a decade ago, has announced a 30-city-plus run that kicks off April 6 at Colorado’s Boulder Theater and will continue through mid-May.

Manager David Britz said the new dates are in support of a non-holiday album planned for an early spring release, as well as a second PBS special.

The group’s current PBS show, “Live In New York: Holiday Edition,” was filmed in August at NYC’s Angel Orensanz Foundation. The special has been wildly successful with viewers and has been picked up by stations across the country for repeated airings during December pledge drives.

SNC’s new PBS special is also expected to be a major part of the network’s spring fund-raising campaign.

In case you’re not familiar with Straight No Chaser’s air-tight harmonies and fresh take on everything from golden oldies like “Can’t Take My Eyes Off of You” to contemporary hits including Amy Winehouse’s “Rehab,” here are a couple of clips to get you up to speed.

First up is the group’s now world-famous version of “The 12 Days of Christmas,” which has been viewed more than 10 million times on YouTube.

And here’s the shiny new video for the single (and SNC original) “Who Spiked the Eggnog?” from the group’s latest holiday release Christmas Cheers. (Jim’s holiday shopping tip #47: Before you hit the stores to battle the masses, download  “The Christmas Can-Can” and add it to your iPod. Believe me, it’ll make the experience a lot more fun.)

Finally, if you’ve ever wondered what people who spend two months out of the year singing Christmas music listen to at Christmas time, the answer is – Christmas music. Here’s the official SNC “Playlist For Driving Around And Looking At Christmas Lights.”

“Birthday of a King/Hark the Herald Angels Sing” – David Phelps
“The Christmas Song” – Nat King Cole
“Merry Christmas Darling” – The Carpenters
“Winter Wonderland” – The Osmonds
“White Christmas” – Bing Crosby
“Do You Hear What I Hear?” – The Blenders
“Have Yourself a Merry Little Christmas” – The Blenders
“The First Noel” – The Blenders
“O Holy Night” – David Phelps
“It’s the Most Wonderful Time of the Year” – Andy Williams
“Have Yourself a Merry Little Christmas” – James Taylor
“It Came Upon a Midnight Clear” – Caedmon’s Call
“White Christmas” – Bing Crosby
“Mary Did You Know?” – Mark Lowry
“In the First Light” – GLAD