I didn’t know that - Gene Pitney - A Town Without Pity.
But, I believe Ricky Nelson sang Hello Mary Lou - no? My mother’s boss’ daughters were much older than me and gave me a bunch of their old 45s (Ricky, Elvis, etc.) and I may have that song on a 45 - I really should see what I have - some oldies but goodies back in the day.
Yes, Ricky Nelson had a big hit with “Hello Mary Lou” - Gene Pitney wrote the song.
There is a YouTube video of a GP concert and he sings songs he wrote but others had hits with them.
Another GP fun fact....his big hit “The Man Who Shot Liberty Valence” was never in the movie of the same name. Excellent song, though written by Burt Bacharach & Hal David.