This episode is very good as far as South Park's recent episodes go. Lately I've been getting the feeling that South Park doesn't feel like an animated comedy, and more of a vehicle for Trey and Matt's commentaries on modern culture.
This episode has commentaries on culture, but the plot relies on one of the characters, this time Kenny. Kenny doesn't usually get very many episodes centered around him, but when he does they are usually incredibly funny, such as Major Boobage.
The plot revolves around Kenny getting a girlfriend, and in an attempt to get her to perform a certain act on him he gets her tickets to a Jonas Brothers concert. But the Jonas Brothers take her back stage, and instead of using her like a groupie they give her a ring to have her pledge abstinence and stay out of trouble. I don't want to give away too much of the plot, but it all turns into a funny commentary on subjects like Disney and Grey's Anatomy.
All in all I'd recommend this episode to fans of the show.