Good things come in three's ?? A numbers racket !!

The Rain, The Park & The Other Things - The Cowsills
Apple, Peaches, Pumpkin Pie - Jay & The Techniques
Mr. Moon, Mr. Cupid and I - Gene Pitney
Rainbows, Pots of Gold and Moonbeams - Studebaker Hawk
Sunshine, Lollipops and Rainbows - Lesley Gore
Me, Myself, I - Joan Armatrading
Shake, Rattle, and Roll - Bill Haley & The Comets
Gloom, Despair and Agony on Me - Buck Owens & Roy Clark
Bewitched, Bothered and Bewildered - Doris Day
Me and you and a Dog Named Boo
Gypsies, Tramps and Thieves
You, Me and Mexico
Stop, Look and Listen
Do a little dance, make a little love, Get Down Tonight
Once, Twice, Three Times a Lady
My Blue Heaven - Fats Domino (Just Molly and me, And the baby make three)
Fun, Fun, Fun - The Beach Boys
ABC - The Jacksons
Willin' (weed, whites, and wine) - Little Feat
Shake shake shake, shake your booty
Signed, sealed, delivered

Dino, Desi, and Billy
Peter, Paul and Mary

Of course, two isn't so bad:
Lennon-McCartney
Push, push in the bush
but
Two Divided By Love - The Grass Roots

and we all know that ONE is the loneliest number