SEASONALLY HARMONIOUS

Backstage at Broadway's Beacon Theatre, RCA's mouth-music mavens Pentatonix make the acquaintance of another a cappella troupe, featuring the dulcet tones of Sony Music boss Rob Stringer, RCA topper Peter Edge, Nipper Co-President Joe Riccitelli and manager Jonathan Kalter. The latter finally convinced his bandmates to attempt a dark and soulful take on "The Dreidel Song," which was only partially marred by Riccitelli's beatboxing.

PTX's Christmas Is Here! is currently #3 at iTunes and on its way to much more chart merriment.