Following on the heels of Brenda Lee's first big hit, "Sweet Nothin's," "I'm Sorry" reached the top of the charts in the summer of 1960 on its way to becoming her definitive song. Calling the song definitive is no stretch of the imagination, either -- Ben Vaughn wrote a song called "I'm Sorry (But So Is Brenda Lee)," which just illustrates how the tune grabbed the public's imagination. Though it might seem a little dated to some modern ears, it deserves its acclaims, since it is among the finest teen pop songs of its era. Written by Ronnie Self, the song blends elements of teenage rock & roll with a sweeping Nashville-styled production, resulting in a melancholy sigh of regret, delivered with adolescent urgency by Lee. The tune is catchy enough and the production is terrific, but Lee's performance is what brings the song to life, elevating beyond typical teenage melodrama. Since the emotions are fairly adolescent and its style is firmly rooted in its era, the song hasn't been covered much, but it would have been hard to top Lee's original recording, simply because it captures the moment so well.