Look up “holiday music” in the dictionary, and it’s likely that there is a photo of the nine-person a cappella group Straight No Chaser instead of a standard definition. For more than two decades, the group has provided the soundtrack of the season, bringing millions of fans to their feet while putting them in the holiday spirit. Year after year, fans anxiously await the moment they can officially hit play on Straight No Chaser favorites. And this year is no different. Straight No Chaser is back on tour, serving up an all-you-can-eat buffet of holiday music (with none of the calories) as they cross the U.S.