You can name the title (not copyright-able) and artist, just not the lyrics.
From what I remember from a long-ago seminar, misquoting song lyric can get you into as much trouble as getting it right, if the song is still identifiable. (For libel, you don't have to name names, for instance, just sufficiently identify.)
You'll do better with movie lines, which are 1) often as well as or better known than song lyrics, 2) less zealously protected by a huge margin, with entire screenplays online unchallenged by the copyright holder, and 3) a far less substantial portion of the whole.
You do know that Penny Lane was a major character in a hit movie only a few years ago, right?
Maryn, who owns the movie