Off the top of my head.. if it's Rock/Pop
Don't stop Believing
Faithfully
Keep On loving You
I Would Do anything for Love
I want to Know what Love is
Beth
Dust in the Wind
Don't Close Your Eyes
Nothing Else Matters
Stairway to Heaven
Sound of Silence- Disturbed version
Can't help feel I'm missing some classics
Meatloaf had some phenomenal ballads.. I don't know, I guess they were rock.. but damn.. Steinman could write some songs.. Anything for Love. Two out of Three Ain't Bad
Ozzy, Mama I'm Coming Home
Zepplin Stairway to Heaven
Hell, let's not forget April Wine Just between you and me
Scorpions...
Cinderella Nobody's Fool
Styx Come Sail Away