The Irish in me just keeps on posting tunes of Erin. For sure and begorrah the frog is still with me.
There are a variety of verses, found one that had more than the chorus.

There's a tear in your eye and I'm wondering why
for it never should be there at all
with such power in your smile sure a stone you'd beguile
and there's never a teardrop should fall

When your sweet lilting laughter's like some fairy song
and your eyes twinkle bright as can be
Oh then laugh all the while and all other times smile
and then smile a smile for me

When Irish Eyes are Smiling sure it's like a morn in spring
In the lilt of Irish laughter you can hear the angels sing
when Irish hearts are happy all the world seems bright and gay
and when Irish eyes are smiling sure they'll steal your heart away

For your smile is a part of the love in your heart,
And it makes even sunshine more bright.
Like the linnet's sweet song, crooning all the day long,
Comes your laughter and light for the springtime of life
Is the sweetest of all

There is ne'er a real care
or regret; ad while springtime is ours
Throughout all of youth's hours,
let us smile each chance that we get.

When Irish Eyes are Smiling sure it's like a morn in spring
In the lilt of Irish laughter you can hear the angels sing
when Irish hearts are happy all the world seems bright and gay
but when Irish eyes are smiling sure they'll steal your heart away