Stephen Colbert continues to bolster his rock-star credentials: After having performed with Jimmy Fallon and Alicia Keys, he’s now releasing a single with the help of Jack White. Colbert performed “Charlene II (I’m Over You),” a comedy rock tune about a stalker, last night as part of this week’s music series on his show: StePhest ColbChella ’011. White produced the track and was on hand to introduce Colbert, who was backed by a goth girl band called the Black Belles. The single will be available on iTunes and from Black's Third Man Records label, notes AP. (More Stephen Colbert stories.)