[fidelis]

I think Pretty Baby would be their most iconic song.

I think you're thinking of this one:

Frankie Valli & The Four Seasons - Who Loves You

Who loves you, pretty baby?
Who's gonna help you through the night?
Who loves you, pretty mama?
Who's always there to make it right?

If I'm not mistaken, the song was inspired by Telly Savalas TV character, "Kojak," whose catch-phrase was "Who loves ya, baby?"

[ifinnegan]

No.

I guess you are right in that the name of the song I’m talking about is Can’t Take My Eyes Off of You.

https://www.youtube.com/watch?v=J36z7AnhvOM

I always thought the name was Pretty Baby.