Pom Pom Play Girl: Carl has the lead.
Which means that the comment about Girl Don't Tell Me being Carl's first lead is also incorrect.
If you're talking about Brian's comment on the back of the SD(ASN!!) cover, then, well, it's not necessarily incorrect. Brian doesn't say it's Carl's first lead, but that it's the first song he wrote that Carl LIKED to sing. Carl had three other leads, two of them covers; the third was pretty much filler.