OK, it's corny, but it's been mentioned in several threads about popular ex-pat Irish songs, but it's never been posted.

Lyrics copied from http://m.nu/eirinn/ceol/d/#did-your

DID YOUR MOTHER COME FROM IRELAND?
Jimmy Kennedy & Michael Carr, 1937

Oh, I've never seen old Ireland o'er the ocean
Though I've wished for the chance to greet it.
In my mind, I've always had a crazy notion
That I'd know a bit of Irish when I meet it.

Did your mother come from Ireland?
'Cause there's something in you Irish
Will you tell me where you get those Irish eyes,
And before she left Killarney,
Did your mother kiss the Blarney?
'Cause your little touch of brogue you can't disguise.

Oh, I wouldn't be romancin'.
I can almost see you dancin'
While the Kerry pipers play.
Sure and maybe we'll be sharin'
In the shamrock you'll be wearin'
On the next St. Patrick's Day.

Did your mother come from Ireland?
'Cause there's something in you Irish
And that bit of Irish steals my heart away.

[Recorded by Bing Crosby, Brian Dullaghan, Connie Francis, Joni James, Charlie Kunz, and Arthur Tracy.]