The holiday party season is in full swing, which may cause many PEOPLE readers to rethink their old iTunes holiday playlist (David Bowie and Bing Crosby singing "Little Drummer Boy"... again?
). Never fear, we have an early sneak peek from Katharine McPhee
, whose latest single is the holiday classic "O Come All Ye Faithful." For those of you yearning to hear McPhee's sultry tones on a ballad (remember her show-stopping rendition of "Over The Rainbow" on American Idol
?), click below for a sample of the song, which drops Tuesday on iTunes' Holiday Page. McPhee will appear on TNT's Christmas in Washington, D.C., on Dec. 12 (8 p.m. ET).– Monica Rizzo