"3" (CD single) (by Britney Spears, Pop)

After a successful comeback concert tour, bubblegum-pop princess Britney Spears is looking to keep up the momentum with "3," a new single from her second greatest hits album. Though the song's title seems innocent enough, the track's premise is anything but: the entire tune is about having a threesome (three people engaging in sex together at once). There's no foul language or graphic descriptions of this, but the message is pervasive and unmistakable; for example, "Three is a charm, two is not the same / I don't see the harm, so are you game? / Lets' make a team, make 'em say my name / Lovin' the extreme, now are you game? / Are you in, livin' in sin is the new thing."

Britney Spears has never been known for having exceptionally strong vocals, and "3" is no exception. To help mask her lack of chops, the song employs just about every production trick in the book, courtesy of producer Max Martin -- the same guy who produced Katy Perry's "I Kissed a Girl." Though the end result sounds way over-produced, it also carries a slick beat that will undoubtedly make the song a club favorite.